/* ===================================================
   KEROLOS NADY GERGES FARAG - SENIOR 3D PORTFOLIO
   High-Tech Cyber Aesthetic, Glassmorphism, 3D Tilt
   =================================================== */

:root {
    --bg-base: #060913;
    --bg-surface: rgba(12, 18, 34, 0.75);
    --bg-surface-elevated: rgba(20, 29, 54, 0.85);
    --bg-glass: rgba(15, 23, 42, 0.65);
    --border-subtle: rgba(255, 255, 255, 0.08);
    --border-glow: rgba(0, 242, 254, 0.35);
    --border-active: rgba(99, 102, 241, 0.5);

    --cyan: #00f2fe;
    --cyan-glow: rgba(0, 242, 254, 0.25);
    --indigo: #6366f1;
    --purple: #8b5cf6;
    --emerald: #10b981;
    --rose: #f43f5e;
    --amber: #fbbf24;

    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'Fira Code', monospace;

    --container-max: 1240px;
    --transition-smooth: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Reset & Global */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-base);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.65;
    overflow-x: hidden;
    position: relative;
    background-image: 
        radial-gradient(circle at 15% 15%, rgba(99, 102, 241, 0.12) 0%, transparent 45%),
        radial-gradient(circle at 85% 65%, rgba(0, 242, 254, 0.09) 0%, transparent 50%);
}

/* Fixed 3D Canvas Layer */
#bg-3d {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 0;
    pointer-events: none;
    opacity: 0.85;
}

.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
    position: relative;
    z-index: 1;
}

.section {
    padding: 90px 0;
    position: relative;
    z-index: 1;
}

.section__header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 56px;
}

.section__eyebrow {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--cyan);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin-bottom: 8px;
    display: inline-block;
}

.section__title {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: #ffffff;
    margin-bottom: 12px;
}

.section__subtitle {
    font-size: 1.05rem;
    color: var(--text-secondary);
}

.text-gradient {
    background: linear-gradient(135deg, var(--cyan) 0%, var(--indigo) 60%, var(--purple) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Header & Navbar */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    transition: var(--transition-smooth);
    padding: 20px 0;
}

.header.scrolled {
    padding: 14px 0;
    background: rgba(6, 9, 19, 0.85);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--border-subtle);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav__logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--text-primary);
}

.logo-box {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--cyan), var(--indigo));
    color: #060913;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.1rem;
    box-shadow: 0 0 20px var(--cyan-glow);
}

.logo-text {
    font-family: var(--font-heading);
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.logo-accent {
    color: var(--cyan);
}

.nav__menu {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav__list {
    display: flex;
    align-items: center;
    list-style: none;
    gap: 26px;
}

.nav__link {
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.92rem;
    font-weight: 500;
    transition: var(--transition-smooth);
    display: flex;
    align-items: center;
    gap: 6px;
}

.nav__num {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--cyan);
}

.nav__link:hover, .nav__link.active {
    color: #ffffff;
}

.nav__link.active {
    color: var(--cyan);
}

.nav__actions {
    display: flex;
    align-items: center;
    gap: 14px;
}

.nav__icon-btn {
    color: var(--text-secondary);
    font-size: 1.15rem;
    transition: var(--transition-smooth);
    text-decoration: none;
    width: 36px;
    height: 36px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-subtle);
}

.nav__icon-btn:hover {
    color: var(--cyan);
    border-color: var(--cyan);
    box-shadow: 0 0 15px var(--cyan-glow);
}

.nav__admin-badge {
    text-decoration: none;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--cyan);
    background: rgba(0, 242, 254, 0.1);
    border: 1px solid rgba(0, 242, 254, 0.3);
    padding: 6px 14px;
    border-radius: 20px;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: var(--transition-smooth);
}

.nav__admin-badge:hover {
    background: rgba(0, 242, 254, 0.2);
    box-shadow: 0 0 20px var(--cyan-glow);
    transform: translateY(-1px);
}

.nav__toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 42px;
    height: 42px;
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--border-subtle);
    border-radius: 10px;
    cursor: pointer;
    gap: 5px;
    z-index: 1100;
    transition: var(--transition-smooth);
    position: relative;
}

.nav__toggle:hover {
    border-color: var(--cyan);
    box-shadow: 0 0 15px var(--cyan-glow);
}

.nav__toggle-bar {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: transform 0.35s ease, opacity 0.25s ease, width 0.3s ease;
    transform-origin: center;
}

.nav__toggle.active .nav__toggle-bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__toggle.active .nav__toggle-bar:nth-child(2) { opacity: 0; width: 0; }
.nav__toggle.active .nav__toggle-bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile overlay backdrop */
.nav__overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.65);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    z-index: 900;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.35s ease;
    display: none;
}
.nav__overlay.show {
    display: block;
    opacity: 1;
    pointer-events: auto;
}


/* ===================================================
   HERO SECTION (3D INTEGRATED LANDING)
   =================================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 130px;
    padding-bottom: 70px;
}

.hero__container {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    gap: 50px;
    align-items: center;
}

.hero__eyebrow {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    color: var(--cyan);
    margin-bottom: 14px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.hero__title {
    font-family: var(--font-heading);
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.025em;
    margin-bottom: 12px;
}

.hero__subtitle {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.hero__description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 36px;
    max-width: 600px;
}

.hero__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 40px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 26px;
    border-radius: 12px;
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition-smooth);
    border: 1px solid transparent;
}

.btn--primary {
    background: linear-gradient(135deg, var(--cyan) 0%, var(--indigo) 100%);
    color: #060913;
    font-weight: 700;
    box-shadow: 0 4px 25px rgba(0, 242, 254, 0.35);
}

.btn--primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(0, 242, 254, 0.55);
}

.btn--outline {
    background: rgba(255, 255, 255, 0.04);
    color: #ffffff;
    border-color: var(--border-subtle);
    backdrop-filter: blur(10px);
}

.btn--outline:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--cyan);
    color: var(--cyan);
    box-shadow: 0 0 20px var(--cyan-glow);
    transform: translateY(-3px);
}

.btn--sm {
    padding: 8px 16px;
    font-size: 0.85rem;
    border-radius: 8px;
}

.hero__quick-meta {
    display: flex;
    align-items: center;
    gap: 24px;
    padding-top: 24px;
    border-top: 1px solid var(--border-subtle);
}

.meta-item {
    display: flex;
    flex-direction: column;
}

.meta-item__val {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--cyan);
}

.meta-item__label {
    font-size: 0.78rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* 3D AVATAR HERO CONTAINER */
.hero__avatar-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.hero__avatar-card {
    position: relative;
    width: 380px;
    max-width: 100%;
    background: var(--bg-surface);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-subtle);
    border-radius: 28px;
    padding: 24px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6), 0 0 40px rgba(99, 102, 241, 0.15);
    transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.3s ease;
    transform-style: preserve-3d;
}

.hero__avatar-card:hover {
    border-color: var(--border-glow);
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.7), 0 0 50px rgba(0, 242, 254, 0.3);
}

.hero__avatar-photo {
    width: 100%;
    aspect-ratio: 1 / 1;
    border-radius: 20px;
    overflow: hidden;
    position: relative;
    background: linear-gradient(135deg, #0f172a, #1e1b4b);
    border: 2px solid rgba(255, 255, 255, 0.1);
}

.hero__avatar-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.5s ease;
}

.hero__avatar-card:hover .hero__avatar-photo img {
    transform: scale(1.04);
}

/* Fallback Tech Monogram if no image uploaded */
.hero__avatar-fallback {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: radial-gradient(circle, #1e293b 0%, #0b0f19 100%);
    color: var(--cyan);
}

.hero__avatar-fallback i {
    font-size: 5rem;
    margin-bottom: 12px;
}

/* Floating Status Pills around Avatar */
.hero__badge-status {
    position: absolute;
    bottom: 12px;
    left: 12px;
    right: 12px;
    background: rgba(6, 9, 19, 0.88);
    backdrop-filter: blur(14px);
    border: 1px solid var(--border-subtle);
    border-radius: 12px;
    padding: 10px 14px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.82rem;
    font-weight: 600;
}

.status-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--emerald);
    box-shadow: 0 0 12px var(--emerald);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.6; transform: scale(0.9); }
}

.hero__card-details {
    margin-top: 18px;
    text-align: center;
}

.hero__card-name {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
}

.hero__card-role {
    font-size: 0.85rem;
    color: var(--cyan);
    margin-top: 2px;
    font-family: var(--font-mono);
}

/* ===================================================
   PROJECTS SECTION & GITHUB SYNC SHOWCASE
   =================================================== */
.projects__filter {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.filter-btn {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-subtle);
    color: var(--text-secondary);
    padding: 10px 22px;
    border-radius: 30px;
    font-size: 0.88rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-smooth);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.filter-btn:hover, .filter-btn.active {
    background: rgba(0, 242, 254, 0.12);
    border-color: var(--cyan);
    color: #ffffff;
    box-shadow: 0 0 20px var(--cyan-glow);
}

.projects__grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
    gap: 28px;
}

.project-card {
    background: var(--bg-surface);
    backdrop-filter: blur(18px);
    border: 1px solid var(--border-subtle);
    border-radius: 20px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: var(--transition-smooth);
    transform-style: preserve-3d;
}

.project-card:hover {
    border-color: var(--border-glow);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5), 0 0 30px var(--cyan-glow);
    transform: translateY(-6px);
}

.project-card__image {
    width: 100%;
    height: 210px;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #0b1329, #172554);
}

.project-card__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.project-card:hover .project-card__image img {
    transform: scale(1.05);
}

.project-card__badge {
    position: absolute;
    top: 14px;
    right: 14px;
    background: rgba(99, 102, 241, 0.9);
    backdrop-filter: blur(8px);
    color: #ffffff;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.project-card__badge--github {
    background: rgba(0, 242, 254, 0.9);
    color: #060913;
}

.project-card__content {
    padding: 24px;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.project-card__header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 8px;
}

.project-card__title {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 700;
    color: #ffffff;
}

.project-card__stats {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.8rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

.project-card__stats span {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.project-card__description {
    font-size: 0.92rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 20px;
    flex: 1;
}

.project-card__tech {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 24px;
}

.tech-tag {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    padding: 4px 10px;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.04);
    color: #93c5fd;
    border: 1px solid rgba(147, 197, 253, 0.2);
}

.project-card__links {
    display: flex;
    gap: 10px;
    align-items: center;
    flex-wrap: wrap;
}

/* ===================================================
   ABOUT PAGE
   =================================================== */
.about-page {
    padding-top: 140px;
}

.about__grid {
    display: grid;
    grid-template-columns: 360px 1fr;
    gap: 40px;
    align-items: start;
    margin-bottom: 70px;
}

.about__profile-card {
    width: 100% !important;
    max-width: 380px;
    margin: 0 auto;
}

.about__contact-meta {
    margin-top: 16px;
    padding-top: 14px;
    border-top: 1px solid var(--border-subtle);
    text-align: left;
    font-size: 0.88rem;
    display: flex;
    flex-direction: column;
    gap: 8px;
    word-break: break-word;
}

.about__meta-link {
    color: var(--cyan);
    text-decoration: none;
    word-break: break-all;
    transition: var(--transition-smooth);
}

.about__meta-link:hover {
    color: #ffffff;
    text-decoration: underline;
}

.about__bio-card {
    background: var(--bg-surface);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border: 1px solid var(--border-subtle);
    border-radius: 24px;
    padding: 36px;
    min-width: 0;
    overflow: hidden;
}

.about__bio-title {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    margin-bottom: 20px;
    color: #ffffff;
    line-height: 1.35;
}

.about__bio-text {
    font-size: 1.05rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 20px;
}

.about__highlights-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
    margin-top: 30px;
    padding-top: 24px;
    border-top: 1px solid var(--border-subtle);
}

.about__highlight-label {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--cyan);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    display: block;
}

.about__highlight-val {
    font-weight: 600;
    margin-top: 4px;
    color: var(--text-primary);
}

/* ===================================================
   SKILLS MATRIX & CATEGORIES
   =================================================== */
.skills__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 28px;
}

.skills__category-card {
    background: var(--bg-surface);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border: 1px solid var(--border-subtle);
    border-radius: 20px;
    padding: 28px;
    transition: var(--transition-smooth);
    min-width: 0;
    overflow: hidden;
}

.skills__category-card:hover {
    border-color: var(--border-glow);
    transform: translateY(-4px);
}

.skills__category-title {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    color: #ffffff;
}

.skills__list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.skill-item {
    min-width: 0;
}

.skill-item__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 6px;
}

.skill-item__header > span:first-child {
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 6px;
    flex: 1;
}

.skill-item__percent {
    font-family: var(--font-mono);
    color: var(--cyan);
    font-size: 0.82rem;
    font-weight: 600;
    flex-shrink: 0;
}

.skill-item__bar {
    width: 100%;
    height: 7px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 10px;
    overflow: hidden;
}

.skill-item__progress {
    height: 100%;
    border-radius: 10px;
    background: linear-gradient(90deg, var(--cyan), var(--indigo));
    transition: width 1.2s cubic-bezier(0.16, 1, 0.3, 1);
}

/* ===================================================
   EXPERIENCE TIMELINE & CERTIFICATIONS
   =================================================== */
.timeline {
    position: relative;
    max-width: 860px;
    margin: 0 auto;
    padding-left: 32px;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 8px;
    width: 2px;
    background: linear-gradient(180deg, var(--cyan) 0%, var(--indigo) 60%, transparent 100%);
}

.timeline-item {
    position: relative;
    margin-bottom: 40px;
}

.timeline-item__marker {
    position: absolute;
    left: -32px;
    top: 6px;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--bg-base);
    border: 3px solid var(--cyan);
    box-shadow: 0 0 15px var(--cyan-glow);
}

.timeline-item__content {
    background: var(--bg-surface);
    backdrop-filter: blur(16px);
    border: 1px solid var(--border-subtle);
    border-radius: 18px;
    padding: 24px;
    transition: var(--transition-smooth);
}

.timeline-item__content:hover {
    border-color: var(--border-glow);
    transform: translateX(6px);
}

.timeline-item__date {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--cyan);
    margin-bottom: 6px;
    display: inline-block;
}

.timeline-item__title {
    font-family: var(--font-heading);
    font-size: 1.35rem;
    font-weight: 700;
}

.timeline-item__company {
    font-size: 1.05rem;
    color: var(--indigo);
    margin-bottom: 12px;
}

.timeline-item__company a {
    color: inherit;
    text-decoration: none;
}

.timeline-item__company a:hover {
    text-decoration: underline;
}

.timeline-item__description {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 16px;
}

.timeline-item__list {
    list-style: none;
    margin-bottom: 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.timeline-item__list li {
    font-size: 0.9rem;
    color: var(--text-secondary);
    position: relative;
    padding-left: 20px;
}

.timeline-item__list li::before {
    content: '▹';
    position: absolute;
    left: 0;
    color: var(--cyan);
}

.timeline-item__techs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 16px;
}

/* Experience Page */
.experience-page {
    padding-top: 140px;
}

.experience-timeline {
    margin-bottom: 80px;
}

/* Credentials Grid: Academic & Certifications */
.credentials__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin-top: 40px;
}

.credentials__col {
    min-width: 0;
}

.credentials__col-title {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 10px;
    color: #ffffff;
}

.education__list,
.certifications__list {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.edu-card {
    background: var(--bg-surface);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-subtle);
    border-radius: 20px;
    padding: 28px;
    transition: var(--transition-smooth);
    min-width: 0;
}

.edu-card:hover {
    border-color: var(--cyan);
    transform: translateY(-3px);
}

.edu-card__date {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--cyan);
    display: block;
    margin-bottom: 6px;
}

.edu-card__degree {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 4px;
}

.edu-card__institution {
    font-size: 1rem;
    color: var(--indigo);
    font-weight: 600;
    margin-bottom: 12px;
}

.edu-card__desc {
    font-size: 0.92rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Certifications Grid */
.certs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin-top: 40px;
}

.cert-card {
    background: var(--bg-surface);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-subtle);
    border-radius: 16px;
    padding: 22px;
    border-left: 4px solid var(--emerald);
    transition: var(--transition-smooth);
    min-width: 0;
}

.cert-card:hover {
    border-color: var(--emerald);
    transform: translateY(-4px);
    box-shadow: 0 10px 30px rgba(16, 185, 129, 0.15);
}

.cert-card__title {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 6px;
    color: #ffffff;
}

.cert-card__issuer {
    font-size: 0.85rem;
    color: var(--emerald);
    font-weight: 600;
    margin-bottom: 10px;
}

.cert-card__desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* ===================================================
   CONTACT SECTION
   =================================================== */
.contact__container {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 40px;
    align-items: start;
}

.contact__info-card {
    background: var(--bg-surface);
    backdrop-filter: blur(18px);
    border: 1px solid var(--border-subtle);
    border-radius: 20px;
    padding: 32px;
}

.contact__details {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-top: 24px;
    font-style: normal;
}

.contact__item {
    display: flex;
    align-items: center;
    gap: 16px;
}

.contact__icon {
    width: 46px;
    height: 46px;
    border-radius: 12px;
    background: rgba(0, 242, 254, 0.1);
    border: 1px solid rgba(0, 242, 254, 0.25);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--cyan);
    font-size: 1.2rem;
    flex-shrink: 0;
}

.contact__text h4 {
    font-size: 0.8rem;
    text-transform: uppercase;
    color: var(--text-muted);
    letter-spacing: 0.05em;
}

.contact__text a, .contact__text span {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    text-decoration: none;
    transition: var(--transition-smooth);
}

.contact__text a:hover {
    color: var(--cyan);
}

.contact__form-card {
    background: var(--bg-surface);
    backdrop-filter: blur(18px);
    border: 1px solid var(--border-subtle);
    border-radius: 20px;
    padding: 36px;
}

.form__group {
    margin-bottom: 20px;
}

.form__label {
    display: block;
    font-size: 0.82rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.form__input, .form__textarea {
    width: 100%;
    background: rgba(6, 9, 19, 0.7);
    border: 1px solid var(--border-subtle);
    border-radius: 10px;
    padding: 14px 18px;
    color: #ffffff;
    font-family: var(--font-body);
    font-size: 0.95rem;
    transition: var(--transition-smooth);
}

.form__input:focus, .form__textarea:focus {
    outline: none;
    border-color: var(--cyan);
    box-shadow: 0 0 20px var(--cyan-glow);
}

.form__textarea {
    min-height: 140px;
    resize: vertical;
}

/* ===================================================
   DOCUMENTATION MODAL & DRAWER
   =================================================== */
.doc-modal {
    position: fixed;
    inset: 0;
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.doc-modal.active {
    opacity: 1;
    pointer-events: auto;
}

.doc-modal__backdrop {
    position: absolute;
    inset: 0;
    background: rgba(4, 7, 15, 0.85);
    backdrop-filter: blur(12px);
}

.doc-modal__container {
    position: relative;
    width: 900px;
    max-width: 92vw;
    max-height: 85vh;
    background: #0b1122;
    border: 1px solid var(--border-glow);
    border-radius: 24px;
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.8), 0 0 50px rgba(0, 242, 254, 0.2);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transform: translateY(20px);
    transition: transform 0.3s ease;
}

.doc-modal.active .doc-modal__container {
    transform: translateY(0);
}

.doc-modal__header {
    padding: 20px 28px;
    background: rgba(15, 23, 42, 0.9);
    border-bottom: 1px solid var(--border-subtle);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.doc-modal__header-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.doc-modal__close {
    background: rgba(255, 255, 255, 0.08);
    border: none;
    color: #fff;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.doc-modal__close:hover {
    background: rgba(244, 63, 94, 0.3);
    color: var(--rose);
}

.doc-modal__body {
    padding: 32px 36px;
    overflow-y: auto;
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--text-primary);
}

/* Rendered Markdown Styling */
.doc-modal__body h1, .doc-modal__body h2, .doc-modal__body h3 {
    font-family: var(--font-heading);
    margin: 24px 0 12px;
    color: #ffffff;
    border-bottom: 1px solid var(--border-subtle);
    padding-bottom: 8px;
}

.doc-modal__body p {
    margin-bottom: 16px;
    color: var(--text-secondary);
}

.doc-modal__body pre {
    background: #060913 !important;
    border: 1px solid var(--border-subtle);
    border-radius: 12px;
    padding: 16px;
    overflow-x: auto;
    margin: 16px 0;
    font-family: var(--font-mono);
    font-size: 0.88rem;
}

.doc-modal__body code {
    font-family: var(--font-mono);
    background: rgba(255, 255, 255, 0.06);
    padding: 2px 6px;
    border-radius: 4px;
    color: var(--cyan);
}

.doc-modal__body table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}

.doc-modal__body th, .doc-modal__body td {
    padding: 10px 14px;
    border: 1px solid var(--border-subtle);
    text-align: left;
}

.doc-modal__body th {
    background: rgba(255, 255, 255, 0.04);
    color: var(--cyan);
}

/* ===================================================
   FOOTER & MISC
   =================================================== */
.footer {
    background: #040710;
    border-top: 1px solid var(--border-subtle);
    padding: 70px 0 30px;
    position: relative;
    z-index: 10;
}

.footer__container {
    display: grid;
    grid-template-columns: 2fr 1fr 1.5fr;
    gap: 40px;
    margin-bottom: 50px;
}

.footer__logo {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: #fff;
    margin-bottom: 16px;
}

.footer__tagline {
    font-size: 0.92rem;
    color: var(--text-secondary);
    line-height: 1.6;
    max-width: 380px;
    margin-bottom: 16px;
}

.footer__status {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.82rem;
    color: var(--emerald);
    font-weight: 500;
}

.footer__col-title {
    font-family: var(--font-heading);
    font-size: 1.05rem;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 18px;
}

.footer__links-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer__links-list a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition-smooth);
}

.footer__links-list a:hover {
    color: var(--cyan);
    padding-left: 4px;
}

.footer__contact-item {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.footer__contact-item i {
    color: var(--cyan);
}

.footer__contact-item a {
    color: inherit;
    text-decoration: none;
}

.footer__contact-item a:hover {
    color: var(--cyan);
}

.footer__socials {
    display: flex;
    gap: 12px;
    margin-top: 20px;
}

.footer__socials a {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-subtle);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition-smooth);
}

.footer__socials a:hover {
    color: var(--cyan);
    border-color: var(--cyan);
    box-shadow: 0 0 15px var(--cyan-glow);
    transform: translateY(-2px);
}

.footer__bottom {
    padding-top: 24px;
    border-top: 1px solid var(--border-subtle);
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.scroll-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: var(--bg-surface);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-subtle);
    color: var(--cyan);
    font-size: 1rem;
    cursor: pointer;
    z-index: 99;
    opacity: 0;
    pointer-events: none;
    transition: var(--transition-smooth);
    display: flex;
    align-items: center;
    justify-content: center;
}

.scroll-top.show {
    opacity: 1;
    pointer-events: auto;
}

.scroll-top:hover {
    background: var(--cyan);
    color: #060913;
    box-shadow: 0 0 20px var(--cyan-glow);
    transform: translateY(-3px);
}


/* ===================================================
   RESPONSIVE SYSTEM — MOBILE FIRST
   Breakpoints: 992px · 768px · 576px · 400px
   =================================================== */

/* ── Tablet (≤ 992px) ── */
@media (max-width: 992px) {

    /* Hero */
    .hero__container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .hero__eyebrow,
    .hero__quick-meta,
    .hero__actions {
        justify-content: center;
    }
    .hero__avatar-wrapper {
        order: -1;
        margin-bottom: 20px;
    }
    .hero__avatar-card {
        width: 300px;
    }
    .hero__description {
        max-width: 100%;
    }

    /* Projects grid */
    .projects__grid {
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    }

    /* Skills grid */
    .skills__grid {
        grid-template-columns: repeat(2, 1fr);
    }

    /* Experience layout */
    .experience__grid {
        grid-template-columns: 1fr;
    }

    /* Contact */
    .contact__container {
        grid-template-columns: 1fr;
    }

    /* Footer */
    .footer__container {
        grid-template-columns: 1fr 1fr;
        gap: 40px;
    }
    .footer__brand {
        grid-column: 1 / -1;
    }

    /* About */
    .about-page {
        padding-top: 110px;
    }
    .about__grid {
        grid-template-columns: 1fr;
        gap: 36px;
    }
    .about__profile-card {
        max-width: 360px;
    }

    /* Experience */
    .experience-page {
        padding-top: 110px;
    }
    .credentials__grid {
        grid-template-columns: 1fr;
        gap: 36px;
    }

    /* Section titles */
    .section__title {
        font-size: 2rem;
    }
}

/* ── Mobile (≤ 768px) ── */
@media (max-width: 768px) {

    /* ── MOBILE NAV DRAWER ── */
    .nav__toggle {
        display: flex;
    }

    .nav__menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: min(82vw, 340px);
        height: 100vh;
        height: 100dvh;
        background: rgba(6, 9, 25, 0.98);
        backdrop-filter: blur(24px);
        -webkit-backdrop-filter: blur(24px);
        border-left: 1px solid var(--border-subtle);
        flex-direction: column;
        align-items: flex-start;
        justify-content: center;
        padding: 60px 36px 40px;
        transition: right 0.42s cubic-bezier(0.16, 1, 0.3, 1);
        box-shadow: -20px 0 60px rgba(0, 0, 0, 0.7);
        gap: 40px;
        z-index: 950;
        overflow-y: auto;
    }

    .nav__menu.show {
        right: 0;
    }

    /* Close button inside the drawer */
    .nav__menu::before {
        content: '';
        display: block;
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        height: 1px;
        background: linear-gradient(90deg, transparent, var(--cyan), transparent);
    }

    .nav__list {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
        width: 100%;
    }

    .nav__item {
        width: 100%;
    }

    .nav__link {
        font-size: 1.2rem;
        font-weight: 600;
        padding: 12px 0;
        border-bottom: 1px solid rgba(255,255,255,0.04);
        width: 100%;
        display: flex;
        align-items: center;
        gap: 10px;
    }

    .nav__num {
        font-size: 0.8rem;
        min-width: 26px;
    }

    .nav__actions {
        flex-direction: row;
        flex-wrap: wrap;
        gap: 12px;
        width: 100%;
        padding-top: 10px;
        border-top: 1px solid var(--border-subtle);
    }

    .nav__admin-badge {
        flex: 1;
        justify-content: center;
        padding: 10px 16px;
        font-size: 0.88rem;
    }

    /* Lock body scroll when menu open */
    body.nav-open {
        overflow: hidden;
    }

    /* ── Hero ── */
    .hero {
        padding-top: 110px;
        padding-bottom: 60px;
    }
    .hero__title {
        font-size: 2.4rem;
    }
    .hero__subtitle {
        font-size: 1.25rem;
    }
    .hero__description {
        font-size: 1rem;
    }
    .hero__quick-meta {
        gap: 16px;
        flex-wrap: wrap;
        justify-content: center;
    }
    .meta-item__val {
        font-size: 1.3rem;
    }
    .hero__avatar-card {
        width: 260px;
    }

    /* ── Sections ── */
    .section {
        padding: 70px 0;
    }
    .section__title {
        font-size: 1.8rem;
    }
    .section__header {
        margin-bottom: 40px;
    }

    /* ── About Page ── */
    .about-page {
        padding-top: 100px;
    }
    .about__grid {
        grid-template-columns: 1fr;
        gap: 28px;
        margin-bottom: 40px;
    }
    .about__profile-card {
        max-width: 320px;
    }
    .about__bio-card {
        padding: 24px 20px;
        border-radius: 18px;
    }
    .about__bio-title {
        font-size: 1.35rem;
        margin-bottom: 16px;
    }
    .about__bio-text {
        font-size: 0.96rem;
        line-height: 1.7;
    }
    .about__highlights-grid {
        grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
        gap: 14px;
        margin-top: 20px;
        padding-top: 18px;
    }

    /* ── Projects ── */
    .projects__grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    .projects__filter {
        gap: 8px;
    }
    .filter-btn {
        padding: 8px 16px;
        font-size: 0.82rem;
    }

    /* ── Skills ── */
    .skills__grid {
        grid-template-columns: 1fr;
    }

    /* ── Experience Page & Timeline ── */
    .experience-page {
        padding-top: 100px;
    }
    .experience-timeline {
        margin-bottom: 50px;
    }
    .timeline {
        padding-left: 24px;
        max-width: 100%;
    }
    .timeline::before {
        left: 5px;
    }
    .timeline-item {
        margin-bottom: 30px;
    }
    .timeline-item__marker {
        left: -24px;
        top: 6px;
        width: 14px;
        height: 14px;
    }
    .timeline-item__content {
        padding: 20px 16px;
        border-radius: 16px;
    }
    .timeline-item__title {
        font-size: 1.18rem;
        line-height: 1.35;
    }
    .timeline-item__company {
        font-size: 0.95rem;
    }
    .timeline-item__description {
        font-size: 0.9rem;
    }
    .timeline-item__list li {
        font-size: 0.85rem;
        padding-left: 16px;
    }
    .credentials__grid {
        grid-template-columns: 1fr;
        gap: 32px;
        margin-top: 30px;
    }
    .credentials__col-title {
        font-size: 1.35rem;
        margin-bottom: 18px;
    }
    .edu-card {
        padding: 20px 16px;
        border-radius: 16px;
    }
    .edu-card__degree {
        font-size: 1.15rem;
    }
    .cert-card {
        padding: 18px 16px;
        border-radius: 14px;
    }

    /* ── Contact ── */
    .contact__container {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    /* ── Footer ── */
    .footer__container {
        grid-template-columns: 1fr;
        gap: 36px;
    }
    .footer__brand {
        grid-column: 1;
    }
    .footer__tagline {
        font-size: 0.88rem;
    }
    .footer__bottom {
        font-size: 0.78rem;
    }

    /* ── Scroll-to-top ── */
    .scroll-top {
        bottom: 20px;
        right: 16px;
        width: 40px;
        height: 40px;
    }

    /* ── Glass cards ── */
    .glass-card,
    .hero__avatar-card,
    .project-card {
        border-radius: 16px;
    }

    /* ── Container padding ── */
    .container {
        padding: 0 16px;
    }

    /* ── Messages ── */
    .messages-container {
        padding: 0 16px;
    }
}

/* ── Small Mobile (≤ 576px) ── */
@media (max-width: 576px) {

    .hero__title {
        font-size: 2rem;
        letter-spacing: -0.02em;
    }
    .hero__subtitle {
        font-size: 1.1rem;
    }
    .hero__actions {
        flex-direction: column;
        align-items: center;
        gap: 12px;
    }
    .hero__actions .btn {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }
    .hero__quick-meta {
        gap: 12px;
    }
    .hero__avatar-card {
        width: 220px;
    }

    /* ── About Page ── */
    .about-page {
        padding-top: 85px;
    }
    .about__profile-card {
        max-width: 100%;
        padding: 16px;
    }
    .about__bio-card {
        padding: 20px 16px;
        border-radius: 16px;
    }
    .about__bio-title {
        font-size: 1.2rem;
    }
    .about__bio-text {
        font-size: 0.92rem;
    }
    .about__highlights-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    .about__contact-meta {
        font-size: 0.84rem;
    }
    .skills__category-card {
        padding: 20px 16px;
        border-radius: 16px;
    }

    /* ── Experience Page ── */
    .experience-page {
        padding-top: 85px;
    }
    .timeline {
        padding-left: 18px;
    }
    .timeline::before {
        left: 3px;
    }
    .timeline-item {
        margin-bottom: 24px;
    }
    .timeline-item__marker {
        left: -18px;
        top: 6px;
        width: 12px;
        height: 12px;
    }
    .timeline-item__content {
        padding: 16px 14px;
        border-radius: 14px;
    }
    .timeline-item__title {
        font-size: 1.1rem;
    }
    .timeline-item__company {
        font-size: 0.9rem;
    }
    .credentials__grid {
        gap: 26px;
    }
    .credentials__col-title {
        font-size: 1.2rem;
    }
    .edu-card {
        padding: 16px 14px;
        border-radius: 14px;
    }
    .edu-card__degree {
        font-size: 1.05rem;
    }
    .cert-card {
        padding: 16px 14px;
    }

    .section__title {
        font-size: 1.6rem;
    }
    .section__subtitle {
        font-size: 0.95rem;
    }

    .project-card__content {
        padding: 18px;
    }

    .logo-text {
        display: none; /* show just K box on very small screens */
    }
}

/* ── Extra Small (≤ 400px) ── */
@media (max-width: 400px) {
    .hero__title {
        font-size: 1.75rem;
    }
    .nav__menu {
        width: 100%;
        border-left: none;
        border-bottom: 1px solid var(--border-subtle);
        height: auto;
        min-height: 100vh;
        min-height: 100dvh;
    }
    .filter-btn {
        padding: 7px 12px;
        font-size: 0.78rem;
    }
    .meta-item__val {
        font-size: 1.15rem;
    }
    .about__bio-card {
        padding: 16px 12px;
    }
    .skills__category-card {
        padding: 16px 12px;
    }
    .skill-item__header {
        font-size: 0.82rem;
    }

    /* ── Experience (≤ 400px) ── */
    .timeline {
        padding-left: 14px;
    }
    .timeline::before {
        left: 2px;
    }
    .timeline-item__marker {
        left: -14px;
        width: 10px;
        height: 10px;
    }
    .timeline-item__content {
        padding: 14px 12px;
    }
    .edu-card {
        padding: 14px 12px;
    }
    .cert-card {
        padding: 14px 12px;
    }
}