@import url('https://fonts.googleapis.com/css2?family=Rajdhani:wght@400;500;600;700&family=Exo+2:wght@300;400;500;600&display=swap');

:root {
    --cyan: #00d4ff;
    --cyan-dim: rgba(0,212,255,0.15);
    --glass-bg: rgba(255,255,255,0.08);
    --glass-border: rgba(255,255,255,0.18);
    --glass-shadow: 0 8px 32px rgba(0,212,255,0.15);
    --transition: all 0.4s cubic-bezier(0.4,0,0.2,1);
}

/* ══════════════ BASE ══════════════ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
    font-family: 'Exo 2', sans-serif;
    min-height: 100vh;
    transition: background 0.8s ease, color 0.4s ease;
}

.heading-font { font-family: 'Rajdhani', sans-serif; letter-spacing: 0.05em; }

/* ══════════════ NIGHT MODE (Default) ══════════════ */
body.night-mode {
    background: radial-gradient(ellipse at 30% 20%, #0d0d3a 0%, #040410 100%);
    color: #fff;
}

/* ══════════════ DAY MODE ══════════════ */
body.day-mode {
    background: linear-gradient(135deg, #e8f4ff 0%, #c8e8ff 40%, #ddf0ff 100%);
    color: #1a1a2e;
}
body.day-mode .glass {
    background: rgba(255,255,255,0.55);
    border: 1px solid rgba(255,255,255,0.8);
    box-shadow: 0 8px 32px rgba(0,100,200,0.15);
}
body.day-mode .text-gray-300 { color: #3a4a6a !important; }
body.day-mode .text-gray-400 { color: #5a6a8a !important; }
body.day-mode .text-white { color: #1a1a2e !important; }
body.day-mode nav h1 { color: #1a1a2e; }
body.day-mode footer { color: #3a4a6a; }

/* ══════════════ GLASS ══════════════ */
.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
}

/* ══════════════ GLOW ══════════════ */
.glow-cyan { text-shadow: 0 0 20px #00d4ff, 0 0 40px #00d4ff88; }

/* ══════════════ STARS (Night Mode) ══════════════ */
#stars-bg {
    position: fixed; top: 0; left: 0;
    width: 100%; height: 100%;
    pointer-events: none; z-index: 0;
    overflow: hidden;
}
.star {
    position: absolute; background: #fff; border-radius: 50%;
    animation: twinkle 3s infinite alternate;
}
@keyframes twinkle { 0%,100% { opacity: 0.15; } 50% { opacity: 1; } }

/* ══════════════ MOON (Night Mode) ══════════════ */
#moon {
    position: fixed; top: 90px; right: 90px;
    width: 64px; height: 64px;
    background: radial-gradient(circle at 35% 35%, #fff8e7, #f4e8c1);
    border-radius: 50%; z-index: 1; pointer-events: none;
    box-shadow: 0 0 30px #f4e8c166, 0 0 80px #f4e8c133;
    animation: moonGlow 6s ease-in-out infinite alternate;
}
@keyframes moonGlow {
    0% { box-shadow: 0 0 30px #f4e8c166, 0 0 80px #f4e8c133; }
    100% { box-shadow: 0 0 50px #f4e8c199, 0 0 120px #f4e8c155; }
}

/* ══════════════ SUN (Day Mode) ══════════════ */
#sun {
    position: fixed; top: 70px; right: 70px;
    width: 80px; height: 80px;
    z-index: 1; pointer-events: none;
}
.sun-core {
    width: 80px; height: 80px;
    background: radial-gradient(circle, #fffde4 10%, #ffe066 50%, #ffaa00 100%);
    border-radius: 50%;
    box-shadow: 0 0 30px #ffe06699, 0 0 70px #ffaa0055, 0 0 120px #ff880033;
    animation: sunPulse 4s ease-in-out infinite;
    position: relative; z-index: 2;
}
@keyframes sunPulse {
    0%,100% { box-shadow: 0 0 30px #ffe06699, 0 0 70px #ffaa0055; transform: scale(1); }
    50% { box-shadow: 0 0 50px #ffe066bb, 0 0 100px #ffaa0077; transform: scale(1.05); }
}
.sun-rays {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    width: 160px; height: 160px;
    animation: raysRotate 12s linear infinite;
    z-index: 1;
}
.sun-ray {
    position: absolute;
    top: 50%; left: 50%;
    width: 3px; height: 35px;
    background: linear-gradient(to bottom, #ffcc00aa, transparent);
    border-radius: 2px;
    transform-origin: top center;
    margin-left: -1.5px; margin-top: 0;
}
@keyframes raysRotate { from { transform: translate(-50%, -50%) rotate(0deg); } to { transform: translate(-50%, -50%) rotate(360deg); } }

/* ══════════════ ENGINEERING BADGE ══════════════ */
.eng-badge {
    display: inline-flex; align-items: center; gap: 8px;
    background: linear-gradient(135deg, rgba(0,212,255,0.15), rgba(0,212,255,0.05));
    border: 1px solid rgba(0,212,255,0.4);
    border-radius: 999px; padding: 4px 16px;
    font-size: 11px; font-weight: 700; letter-spacing: 0.15em;
    color: var(--cyan); text-transform: uppercase;
    animation: badgePulse 3s ease-in-out infinite;
}
.eng-badge i { font-size: 10px; }
@keyframes badgePulse {
    0%,100% { box-shadow: 0 0 0 0 rgba(0,212,255,0.2); }
    50% { box-shadow: 0 0 0 6px rgba(0,212,255,0); }
}

/* ══════════════ 3D CARDS ══════════════ */
.card-3d { perspective: 1200px; cursor: pointer; }
.card-3d-inner {
    transition: transform 0.5s cubic-bezier(0.34,1.56,0.64,1), box-shadow 0.4s ease;
    transform-style: preserve-3d; will-change: transform;
}
.card-3d:hover .card-3d-inner {
    transform: rotateY(10deg) rotateX(6deg) scale(1.04);
    box-shadow: -10px 10px 40px rgba(0,212,255,0.25);
}
/* JS-driven tilt (applied inline) */

/* ══════════════ NAV ══════════════ */
nav { position: sticky; top: 0; z-index: 100; }
.nav-inner {
    max-width: 1400px; margin: 0 auto;
    padding: 14px 24px;
    display: flex; align-items: center; justify-content: space-between;
}
.nav-logo { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.nav-logo img { width: 40px; height: 40px; border-radius: 12px; object-fit: cover; }
.nav-logo-text h1 {
    font-family: 'Rajdhani', sans-serif;
    font-size: 20px; font-weight: 700; letter-spacing: 0.08em;
    line-height: 1;
}
.nav-logo-text p { font-size: 10px; color: var(--cyan); letter-spacing: 0.12em; }

.nav-links { display: flex; align-items: center; gap: 6px; }
.nav-links a {
    padding: 6px 12px; border-radius: 999px;
    font-size: 12px; font-weight: 600; letter-spacing: 0.06em;
    text-decoration: none; color: inherit; opacity: 0.75;
    transition: var(--transition);
}
.nav-links a:hover, .nav-links a.active {
    opacity: 1; color: var(--cyan);
    background: rgba(0,212,255,0.1);
}
.nav-links a.active { opacity: 1; }

.nav-controls { display: flex; align-items: center; gap: 10px; }
.theme-btn {
    display: flex; align-items: center; gap: 6px;
    padding: 8px 16px; border-radius: 999px;
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.2);
    cursor: pointer; font-size: 13px; font-weight: 600;
    color: inherit; transition: var(--transition);
}
.theme-btn:hover { background: rgba(0,212,255,0.2); border-color: var(--cyan); }

.hamburger-btn {
    display: none; background: none; border: none;
    font-size: 22px; cursor: pointer; color: inherit;
    padding: 8px;
}

/* Mobile menu */
.mobile-menu {
    display: none; flex-direction: column; gap: 4px;
    padding: 12px 20px 16px;
    border-top: 1px solid rgba(255,255,255,0.1);
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
    padding: 10px 14px; border-radius: 12px;
    text-decoration: none; color: inherit; font-size: 13px; font-weight: 600;
    opacity: 0.8; transition: var(--transition);
}
.mobile-menu a:hover { background: rgba(0,212,255,0.1); opacity: 1; color: var(--cyan); }

@media (max-width: 900px) {
    .nav-links { display: none; }
    .hamburger-btn { display: block; }
    #google_translate_element { display: none; }
}
@media (min-width: 901px) {
    .mobile-menu { display: none !important; }
}

/* ══════════════ FOOTER ══════════════ */
.site-footer {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding: 48px 24px 32px;
    text-align: center;
}
.footer-inner { max-width: 1400px; margin: 0 auto; }
.footer-socials { display: flex; justify-content: center; gap: 28px; margin-bottom: 20px; }
.footer-socials i {
    font-size: 26px; cursor: pointer; transition: var(--transition);
    opacity: 0.7;
}
.footer-socials i:hover { color: var(--cyan); opacity: 1; transform: scale(1.2) translateY(-3px); }
.footer-copy { font-size: 12px; opacity: 0.5; letter-spacing: 0.05em; }

/* ══════════════ WELCOME MODAL ══════════════ */
#welcome-overlay {
    position: fixed; inset: 0; z-index: 9999;
    background: rgba(4, 4, 16, 0.92);
    backdrop-filter: blur(20px);
    display: flex; align-items: center; justify-content: center;
    animation: fadeIn 0.5s ease;
}
#welcome-overlay.hidden { display: none; }
.welcome-box {
    max-width: 480px; width: 90%;
    padding: 48px 40px; border-radius: 28px;
    text-align: center;
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(0,212,255,0.3);
    box-shadow: 0 0 60px rgba(0,212,255,0.15);
    animation: slideUp 0.6s cubic-bezier(0.34,1.56,0.64,1);
}
.welcome-box h2 { font-family: 'Rajdhani', sans-serif; font-size: 36px; font-weight: 700; margin-bottom: 8px; }
.welcome-box p { opacity: 0.7; margin-bottom: 28px; }
.welcome-input {
    width: 100%; padding: 14px 20px; border-radius: 14px;
    border: 1px solid rgba(0,212,255,0.4);
    background: rgba(255,255,255,0.06);
    color: #fff; font-size: 16px; font-family: 'Exo 2', sans-serif;
    outline: none; margin-bottom: 16px;
    transition: border-color 0.3s;
}
.welcome-input:focus { border-color: var(--cyan); }
.welcome-btn {
    width: 100%; padding: 14px; border-radius: 14px;
    background: var(--cyan); color: #040410;
    font-size: 15px; font-weight: 700; font-family: 'Rajdhani', sans-serif;
    letter-spacing: 0.1em; border: none; cursor: pointer;
    transition: var(--transition);
}
.welcome-btn:hover { background: #33dfff; transform: translateY(-2px); }
.welcome-skip { margin-top: 12px; font-size: 12px; opacity: 0.5; cursor: pointer; }
.welcome-skip:hover { opacity: 0.8; }

/* Welcome toast */
#welcome-toast {
    position: fixed; bottom: 28px; right: 28px; z-index: 9998;
    background: rgba(0,212,255,0.15);
    border: 1px solid rgba(0,212,255,0.4);
    backdrop-filter: blur(20px);
    padding: 16px 24px; border-radius: 20px;
    color: #fff; font-size: 14px; font-weight: 600;
    display: flex; align-items: center; gap: 12px;
    animation: toastIn 0.5s cubic-bezier(0.34,1.56,0.64,1);
    max-width: 320px;
}
#welcome-toast.hidden { display: none; }
#welcome-toast i { font-size: 22px; color: var(--cyan); }
@keyframes toastIn {
    from { transform: translateY(60px) scale(0.8); opacity: 0; }
    to { transform: translateY(0) scale(1); opacity: 1; }
}

/* ══════════════ UNDER CONSTRUCTION ══════════════ */
.uc-page {
    min-height: 80vh; display: flex; align-items: center;
    justify-content: center; text-align: center; padding: 40px 20px;
}
.uc-box {
    max-width: 560px;
    animation: floatUp 0.8s ease;
}
.uc-icon {
    font-size: 80px; margin-bottom: 24px;
    animation: ucFloat 3s ease-in-out infinite;
    display: block;
}
@keyframes ucFloat {
    0%,100% { transform: translateY(0) rotate(-5deg); }
    50% { transform: translateY(-18px) rotate(5deg); }
}
.uc-title {
    font-family: 'Rajdhani', sans-serif;
    font-size: 52px; font-weight: 700; letter-spacing: 0.05em;
    margin-bottom: 12px;
}
.uc-sub { opacity: 0.6; font-size: 16px; margin-bottom: 32px; }
.uc-progress {
    width: 100%; height: 4px; background: rgba(255,255,255,0.1);
    border-radius: 999px; overflow: hidden; margin-bottom: 32px;
}
.uc-bar {
    height: 100%; background: linear-gradient(90deg, var(--cyan), #0080ff);
    border-radius: 999px;
    animation: ucBar 2.5s ease-in-out infinite alternate;
}
@keyframes ucBar { from { width: 20%; } to { width: 85%; } }

.uc-orbit {
    position: relative; width: 120px; height: 120px;
    margin: 0 auto 32px;
}
.uc-orbit-ring {
    position: absolute; inset: 0; border-radius: 50%;
    border: 2px solid rgba(0,212,255,0.3);
    border-top-color: var(--cyan);
    animation: orbitSpin 2s linear infinite;
}
.uc-orbit-ring:nth-child(2) {
    inset: 14px;
    border-color: rgba(0,212,255,0.2);
    border-right-color: #0080ff;
    animation-duration: 1.3s; animation-direction: reverse;
}
.uc-center-icon {
    position: absolute; inset: 0;
    display: flex; align-items: center; justify-content: center;
    font-size: 36px;
}
@keyframes orbitSpin { to { transform: rotate(360deg); } }

.home-btn {
    display: inline-flex; align-items: center; gap: 10px;
    padding: 14px 32px; border-radius: 999px;
    background: var(--cyan); color: #040410;
    font-family: 'Rajdhani', sans-serif; font-size: 16px;
    font-weight: 700; letter-spacing: 0.1em;
    text-decoration: none; transition: var(--transition);
    box-shadow: 0 0 20px rgba(0,212,255,0.4);
}
.home-btn:hover { transform: translateY(-3px) scale(1.04); box-shadow: 0 0 40px rgba(0,212,255,0.6); }

/* ══════════════ ANIMATIONS ══════════════ */
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideUp { from { transform: translateY(40px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }
@keyframes floatUp { from { transform: translateY(30px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }

/* ══════════════ GOOGLE TRANSLATE ══════════════ */
.goog-te-gadget { font-size: 0 !important; }
.goog-te-gadget select {
    font-size: 11px !important;
    background: rgba(255,255,255,0.1);
    color: inherit; border: 1px solid rgba(255,255,255,0.2);
    border-radius: 8px; padding: 4px 8px; cursor: pointer;
}

/* ══════════════ SCROLLBAR ══════════════ */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(0,212,255,0.4); border-radius: 3px; }