/* ================================================
   ROHIT KUMAR PORTFOLIO — MAIN STYLESHEET
   ================================================ */


/* --- VARIABLES --- */

:root {
    --bg: #070b14;
    --surface: #0f1624;
    --surface2: #151e30;
    --border: #1e2e48;
    --accent: #00c8ff;
    --accent2: #4fffb0;
    --accent3: #ff6b6b;
    --accent4: #ffd166;
    --text: #dde6f0;
    --text-dim: #6a7f9a;
    --glow: rgba(0, 200, 255, 0.18);
    --radius: 10px;
    --radius-lg: 16px;
    --transition: 0.3s ease;
}


/* --- RESET --- */

*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    background: var(--bg);
    color: var(--text);
    font-family: 'DM Sans', sans-serif;
    overflow-x: hidden;
    cursor: none;
}

a {
    text-decoration: none;
    color: inherit;
}

img {
    display: block;
    max-width: 100%;
}

ul {
    list-style: none;
}


/* --- NOISE TEXTURE --- */

body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.035'/%3E%3C/svg%3E");
    pointer-events: none;
    z-index: 1000;
    opacity: 0.6;
}


/* --- CUSTOM CURSOR --- */

.cursor {
    position: fixed;
    top: 0;
    left: 0;
    width: 12px;
    height: 12px;
    background: var(--accent);
    border-radius: 50%;
    pointer-events: none;
    z-index: 9999;
    transform: translate(-50%, -50%);
    transition: width 0.2s, height 0.2s, background 0.2s;
    mix-blend-mode: screen;
}

.cursor-ring {
    position: fixed;
    top: 0;
    left: 0;
    width: 36px;
    height: 36px;
    border: 1.5px solid rgba(0, 200, 255, 0.4);
    border-radius: 50%;
    pointer-events: none;
    z-index: 9998;
    transform: translate(-50%, -50%);
    transition: width 0.2s, height 0.2s;
}

.cursor.hover {
    width: 20px;
    height: 20px;
}

.cursor-ring.hover {
    width: 50px;
    height: 50px;
}


/* --- NAVBAR --- */

nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 500;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 52px;
    background: rgba(7, 11, 20, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(30, 46, 72, 0.5);
    transition: padding var(--transition);
}

nav.scrolled {
    padding: 14px 52px;
}

.nav-logo {
    font-family: 'Syne', sans-serif;
    font-size: 20px;
    font-weight: 800;
    color: #fff;
    letter-spacing: -0.5px;
}

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

.nav-links {
    display: flex;
    gap: 36px;
}

.nav-links a {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 12px;
    color: var(--text-dim);
    letter-spacing: 1px;
    text-transform: uppercase;
    transition: color var(--transition);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--accent);
    transition: width var(--transition);
}

.nav-links a:hover {
    color: var(--accent);
}

.nav-links a:hover::after {
    width: 100%;
}

.nav-cta {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 11px;
    color: var(--accent);
    border: 1px solid var(--accent);
    padding: 8px 18px;
    border-radius: 4px;
    letter-spacing: 1px;
    text-transform: uppercase;
    transition: background var(--transition), color var(--transition);
}

.nav-cta:hover {
    background: var(--accent);
    color: #000;
}


/* --- SECTION COMMON --- */

section {
    padding: 100px 52px;
    position: relative;
}

.section-inner {
    max-width: 1200px;
    margin: 0 auto;
}

.section-label {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 11px;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.section-label::before {
    content: '';
    width: 24px;
    height: 1px;
    background: var(--accent);
}

h2 {
    font-family: 'Syne', sans-serif;
    font-size: clamp(28px, 4vw, 42px);
    font-weight: 800;
    color: #fff;
    letter-spacing: -1px;
    margin-bottom: 48px;
}


/* --- HERO --- */

#hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 52px 80px;
    overflow: hidden;
}

.hero-bg-grid {
    position: absolute;
    inset: 0;
    background-image: linear-gradient(rgba(0, 200, 255, 0.04) 1px, transparent 1px), linear-gradient(90deg, rgba(0, 200, 255, 0.04) 1px, transparent 1px);
    background-size: 60px 60px;
    animation: gridPan 20s linear infinite;
}

@keyframes gridPan {
    from {
        background-position: 0 0;
    }
    to {
        background-position: 60px 60px;
    }
}

.hero-glow {
    position: absolute;
    top: -200px;
    right: -200px;
    width: 700px;
    height: 700px;
    background: radial-gradient(circle, rgba(0, 200, 255, 0.07) 0%, transparent 70%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    gap: 80px;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

.hero-text {
    flex: 1;
}

.hero-tag {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 11px;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.hero-tag::before {
    content: '';
    width: 32px;
    height: 1px;
    background: var(--accent);
}

h1 {
    font-family: 'Syne', sans-serif;
    font-size: clamp(44px, 6vw, 72px);
    font-weight: 800;
    line-height: 1.08;
    color: #fff;
    letter-spacing: -1.5px;
    margin-bottom: 24px;
}

h1 .accent {
    color: var(--accent);
}

h1 .line2 {
    color: var(--text-dim);
    font-weight: 400;
}

.hero-desc {
    font-size: 16px;
    color: var(--text-dim);
    line-height: 1.7;
    max-width: 520px;
    margin-bottom: 36px;
}

.hero-btns {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.btn-primary {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 12px;
    letter-spacing: 1px;
    text-transform: uppercase;
    background: var(--accent);
    color: #000;
    padding: 14px 28px;
    border-radius: 4px;
    font-weight: 600;
    transition: box-shadow var(--transition), transform 0.2s;
}

.title {
    line-height: 1.2;
    animation: breathe 3s ease-in-out infinite;
}

.btn-primary:hover {
    box-shadow: 0 0 30px rgba(0, 200, 255, 0.5);
    transform: translateY(-2px);
}

.btn-ghost {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 12px;
    letter-spacing: 1px;
    text-transform: uppercase;
    border: 1px solid var(--border);
    color: var(--text-dim);
    padding: 14px 28px;
    border-radius: 4px;
    transition: border-color var(--transition), color var(--transition);
}

.btn-ghost:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.btn-download {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 12px;
    letter-spacing: 1px;
    text-transform: uppercase;
    border: 1px solid var(--accent2);
    color: var(--accent2);
    padding: 14px 28px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: background var(--transition), color var(--transition);
}

.btn-download:hover {
    background: var(--accent2);
    color: #000;
}


/* --- PHOTO --- */

.hero-photo-wrap {
    position: relative;
    flex-shrink: 0;
}

.hero-photo-frame {
    width: 280px;
    height: 340px;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border);
    box-shadow: 0 0 60px rgba(0, 200, 255, 0.1);
}

.hero-photo-frame img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
    filter: grayscale(20%);
    transition: filter 0.4s;
}

.hero-photo-frame:hover img {
    filter: grayscale(0%);
}

.hero-photo-frame::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0, 200, 255, 0.15), transparent 60%);
    pointer-events: none;
}

.photo-corner {
    position: absolute;
    width: 20px;
    height: 20px;
    border-color: var(--accent);
    border-style: solid;
}

.photo-corner.tl {
    top: -8px;
    left: -8px;
    border-width: 2px 0 0 2px;
}

.photo-corner.tr {
    top: -8px;
    right: -8px;
    border-width: 2px 2px 0 0;
}

.photo-corner.bl {
    bottom: -8px;
    left: -8px;
    border-width: 0 0 2px 2px;
}

.photo-corner.br {
    bottom: -8px;
    right: -8px;
    border-width: 0 2px 2px 0;
}


/* --- SKILLS --- */

#skills {
    background: var(--surface);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
}

.skill-card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.skill-card:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(0, 200, 255, 0.1);
}

.skill-card-title {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 10px;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 14px;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.skill-tag {
    font-size: 12px;
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 4px 10px;
    color: var(--text-dim);
    font-family: 'IBM Plex Mono', monospace;
    transition: border-color 0.2s, color 0.2s;
}

.skill-card:hover .skill-tag {
    border-color: rgba(0, 200, 255, 0.3);
    color: var(--text);
}


/* --- PROJECTS --- */

#projects {
    background: var(--bg);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 20px;
}

.project-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    display: block;
    color: inherit;
    transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.project-card:hover {
    border-color: var(--accent);
    transform: translateY(-6px);
    box-shadow: 0 12px 40px rgba(0, 200, 255, 0.12);
}

.project-thumb {
    height: 160px;
    background: var(--surface2);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    border-bottom: 1px solid var(--border);
    position: relative;
}

.project-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.75;
    transition: opacity 0.3s, transform 0.4s;
}

.project-card:hover .project-thumb img {
    opacity: 1;
    transform: scale(1.04);
}

.project-thumb-icon {
    font-size: 48px;
    opacity: 0.4;
}

.project-body {
    padding: 24px;
}

.project-num {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 10px;
    color: var(--accent);
    letter-spacing: 2px;
    margin-bottom: 8px;
}

.project-title {
    font-family: 'Syne', sans-serif;
    font-size: 18px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 10px;
    line-height: 1.3;
}

.project-desc {
    font-size: 13px;
    color: var(--text-dim);
    line-height: 1.6;
    margin-bottom: 16px;
}

.project-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 16px;
}

.project-tag {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 10px;
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: 3px;
    padding: 3px 8px;
    color: var(--text-dim);
}

.project-link {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 11px;
    color: var(--accent);
    letter-spacing: 1px;
    text-transform: uppercase;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: gap 0.2s;
}

.project-card:hover .project-link {
    gap: 10px;
}


/* --- CV DOWNLOAD --- */

#cv {
    background: var(--surface);
}

.cv-card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 48px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
    flex-wrap: wrap;
    transition: border-color var(--transition), box-shadow var(--transition);
    max-width: 900px;
}

.cv-card:hover {
    border-color: var(--accent2);
    box-shadow: 0 0 40px rgba(79, 255, 176, 0.07);
}

.cv-info {
    flex: 1;
}

.cv-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.cv-title {
    font-family: 'Syne', sans-serif;
    font-size: 24px;
    font-weight: 800;
    color: #fff;
    margin-bottom: 8px;
}

.cv-desc {
    font-size: 14px;
    color: var(--text-dim);
    line-height: 1.6;
    max-width: 500px;
}

.cv-meta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-top: 16px;
}

.cv-badge {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 10px;
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 4px 12px;
    color: var(--text-dim);
}

.cv-actions {
    display: flex;
    flex-direction: column;
    gap: 12px;
    flex-shrink: 0;
}

.btn-cv-download {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 12px;
    letter-spacing: 1px;
    text-transform: uppercase;
    background: var(--accent2);
    color: #000;
    font-weight: 700;
    padding: 14px 28px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: box-shadow var(--transition), transform 0.2s;
    white-space: nowrap;
}

.btn-cv-download:hover {
    box-shadow: 0 0 30px rgba(79, 255, 176, 0.4);
    transform: translateY(-2px);
}

.btn-cv-preview {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 12px;
    letter-spacing: 1px;
    text-transform: uppercase;
    border: 1px solid var(--border);
    color: var(--text-dim);
    padding: 14px 28px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: border-color var(--transition), color var(--transition);
    text-align: center;
    justify-content: center;
    white-space: nowrap;
}

.btn-cv-preview:hover {
    border-color: var(--accent);
    color: var(--accent);
}


/* CV PREVIEW MODAL */

.cv-modal {
    position: fixed;
    inset: 0;
    z-index: 800;
    background: rgba(7, 11, 20, 0.92);
    backdrop-filter: blur(8px);
    display: none;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
}

.cv-modal.open {
    display: flex;
}

.cv-modal-inner {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 860px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    box-shadow: 0 0 80px rgba(0, 200, 255, 0.1);
}

.cv-modal-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 24px;
    border-bottom: 1px solid var(--border);
}

.cv-modal-title {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 12px;
    color: var(--accent);
    letter-spacing: 2px;
    text-transform: uppercase;
}

.cv-modal-close {
    background: none;
    border: 1px solid var(--border);
    color: var(--text-dim);
    font-size: 18px;
    cursor: pointer;
    width: 32px;
    height: 32px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: border-color var(--transition), color var(--transition);
}

.cv-modal-close:hover {
    border-color: var(--accent3);
    color: var(--accent3);
}

.cv-modal-body {
    flex: 1;
    overflow: hidden;
}

.cv-modal-body iframe {
    width: 100%;
    height: 100%;
    border: none;
    min-height: 70vh;
}


/* --- EDUCATION --- */

#education {
    background: var(--bg);
}

.edu-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 16px;
}

.edu-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    transition: border-color var(--transition);
}

.edu-card:hover {
    border-color: var(--accent2);
}

.edu-card .year {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 10px;
    color: var(--accent2);
    letter-spacing: 2px;
    margin-bottom: 8px;
}

.edu-card .inst {
    font-family: 'Syne', sans-serif;
    font-size: 16px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 4px;
}

.edu-card .deg {
    font-size: 13px;
    color: var(--text-dim);
}

.cert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 16px;
    margin-top: 16px;
}

.cert-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px 24px;
    display: flex;
    gap: 14px;
    align-items: flex-start;
    transition: border-color var(--transition);
}

.cert-card:hover {
    border-color: var(--accent2);
}

.cert-icon {
    font-size: 24px;
    flex-shrink: 0;
}

.cert-name {
    font-size: 13px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 4px;
}

.cert-date {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 10px;
    color: var(--accent2);
    letter-spacing: 1px;
}

.cert-desc {
    font-size: 12px;
    color: var(--text-dim);
    margin-top: 4px;
    line-height: 1.5;
}


/* --- ACHIEVEMENTS --- */

#achievements {
    background: var(--surface);
}

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

.ach-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px 24px;
    transition: border-color var(--transition);
}

.ach-item:hover {
    border-color: var(--accent3);
}

.ach-icon {
    font-size: 28px;
    flex-shrink: 0;
}

.ach-title {
    font-size: 14px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 4px;
}

.ach-date {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 10px;
    color: var(--accent3);
    letter-spacing: 1px;
}


/* --- CONTACT --- */

#contact {
    background: var(--bg);
    text-align: center;
}

#contact h2 {
    margin-bottom: 12px;
}

.contact-sub {
    color: var(--text-dim);
    font-size: 15px;
    max-width: 480px;
    margin: 0 auto 36px;
    line-height: 1.7;
}

.contact-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 14px;
}

.contact-link {
    display: flex;
    align-items: center;
    gap: 10px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 14px 24px;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 12px;
    color: var(--text-dim);
    transition: border-color var(--transition), color var(--transition), transform 0.2s;
}

.contact-link:hover {
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-3px);
}


/* --- FOOTER --- */

footer {
    padding: 24px 52px;
    border-top: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 11px;
    color: var(--text-dim);
}


/* --- SCROLL REVEAL --- */

.reveal {
    opacity: 0;
    transform: translateY(24px);
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.6s ease, transform 0.6s ease;
}


/* --- RESPONSIVE --- */

@media (max-width: 900px) {
    nav {
        padding: 16px 24px;
    }
    nav.scrolled {
        padding: 12px 24px;
    }
    .nav-links {
        display: none;
    }
    #hero {
        padding: 100px 24px 60px;
    }
    .hero-content {
        flex-direction: column-reverse;
        gap: 40px;
    }
    .hero-photo-frame {
        width: 200px;
        height: 240px;
    }
    section {
        padding: 70px 24px;
    }
    .edu-grid {
        grid-template-columns: 1fr;
    }
    .cv-card {
        flex-direction: column;
    }
    .cv-actions {
        flex-direction: row;
    }
    footer {
        padding: 20px 24px;
        flex-direction: column;
        gap: 8px;
        text-align: center;
    }
}