/* ======================================================
   SIDDH SHAH — Portfolio Custom Styles
   Black & Blue Futuristic Theme
   ====================================================== */

/* ---- CSS Variables ---- */
:root {
    --dark-900: #09090b;
    --dark-800: #0f172a;
    --dark-700: #1e293b;
    --accent: #3b82f6;
    --accent-light: #60a5fa;
    --accent-glow: #06b6d4;
}

/* ---- Base ---- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: auto; /* GSAP handles smooth scrolling */
}

::selection {
    background: rgba(59, 130, 246, 0.3);
    color: #fff;
}

/* ---- Scrollbar ---- */
::-webkit-scrollbar {
    width: 6px;
}
::-webkit-scrollbar-track {
    background: var(--dark-900);
}
::-webkit-scrollbar-thumb {
    background: var(--accent);
    border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--accent-light);
}

/* ---- Grid Overlay ---- */
.grid-overlay {
    position: fixed;
    inset: 0;
    z-index: 1;
    pointer-events: none;
    background-image:
        linear-gradient(rgba(59, 130, 246, 0.025) 1px, transparent 1px),
        linear-gradient(90deg, rgba(59, 130, 246, 0.025) 1px, transparent 1px);
    background-size: 80px 80px;
}

/* ---- Text Gradient ---- */
.text-gradient {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-glow) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ---- Glassmorphism Card ---- */
.glass-card {
    background: rgba(15, 23, 42, 0.5);
    border: 1px solid rgba(59, 130, 246, 0.1);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: border-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
}
.glass-card:hover {
    border-color: rgba(59, 130, 246, 0.3);
    transform: translateY(-4px);
    box-shadow: 0 20px 60px rgba(59, 130, 246, 0.08);
}

/* ---- Preloader (Sphere-based) ---- */
#preloader-content {
    text-align: center;
}

.preloader-label {
    letter-spacing: 0.4em;
    animation: preloaderFadeIn 0.6s ease-out;
}

.preloader-bar-track {
    animation: preloaderFadeIn 0.8s ease-out 0.2s both;
}

.preloader-status {
    animation: preloaderPulse 2s ease-in-out infinite;
}

@keyframes preloaderFadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes preloaderPulse {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 1; }
}

/* ---- Cursor Glow ---- */
#cursor-glow {
    position: fixed;
    width: 500px;
    height: 500px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.08) 0%, transparent 70%);
    pointer-events: none;
    z-index: 2;
    transform: translate(-50%, -50%);
    transition: left 0.15s ease, top 0.15s ease;
    will-change: left, top;
}

/* ---- Navbar ---- */
#navbar.scrolled {
    background: rgba(9, 9, 11, 0.9) !important;
    backdrop-filter: blur(20px) !important;
    -webkit-backdrop-filter: blur(20px) !important;
    border-bottom: 1px solid rgba(59, 130, 246, 0.08);
}

/* ---- Scrollbar Hide Utility ---- */
.scrollbar-hide {
    -ms-overflow-style: none;
    scrollbar-width: none;
}
.scrollbar-hide::-webkit-scrollbar {
    display: none;
}

/* ---- Hero — Hidden Until Animated ---- */
.hero-subtitle,
.hero-title,
.hero-tagline,
.hero-cta,
.scroll-indicator {
    opacity: 0;
    transform: translateY(30px);
}
.hero-title {
    transform: translateY(60px);
}
.scroll-indicator {
    transform: translateY(0);
}

/* ---- Hero Scroll Indicator ---- */
.scroll-dot {
    animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
    0%, 100% { transform: translateY(0); opacity: 1; }
    50% { transform: translateY(10px); opacity: 0.3; }
}

/* ---- Tech Tags ---- */
.tech-tag {
    display: inline-block;
    padding: 6px 14px;
    font-size: 12px;
    font-weight: 500;
    color: var(--accent);
    background: rgba(59, 130, 246, 0.08);
    border: 1px solid rgba(59, 130, 246, 0.15);
    border-radius: 9999px;
    transition: all 0.3s ease;
}
.tech-tag:hover {
    background: rgba(59, 130, 246, 0.15);
    border-color: rgba(59, 130, 246, 0.4);
}

/* ---- Service Card Glow ---- */
.service-card {
    position: relative;
    overflow: hidden;
}
.service-glow {
    position: absolute;
    bottom: -50%;
    left: 50%;
    width: 200%;
    height: 100%;
    transform: translateX(-50%);
    background: radial-gradient(ellipse, rgba(59, 130, 246, 0.08) 0%, transparent 60%);
    opacity: 0;
    transition: opacity 0.5s ease;
    pointer-events: none;
}
.service-card:hover .service-glow {
    opacity: 1;
}

/* ---- Project Cards ---- */
.project-card {
    flex-shrink: 0;
}
.project-img {
    position: relative;
    overflow: hidden;
}
.project-img::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to bottom, transparent 50%, rgba(15, 23, 42, 0.8) 100%);
}

/* ---- Timeline ---- */
.timeline-progress {
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, var(--accent), var(--accent-glow));
    transform-origin: top;
    box-shadow: 0 0 12px rgba(59, 130, 246, 0.5);
}

.timeline-dot {
    transition: all 0.3s ease;
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.15);
}
.timeline-dot.active {
    background: var(--accent) !important;
    box-shadow: 0 0 0 6px rgba(59, 130, 246, 0.25), 0 0 20px rgba(59, 130, 246, 0.4);
}

/* ---- Contact Form ---- */
.contact-input:focus {
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.15);
}

/* ---- Misc Animations ---- */
@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-15px); }
}

.floating {
    animation: float 6s ease-in-out infinite;
}

/* ============================================
   RESPONSIVE — All Screen Sizes
   ============================================ */

/* ---- Large tablets & small laptops (≤1024px) ---- */
@media (max-width: 1024px) {
    .service-card .p-8 {
        padding: 1.5rem;
    }
}

/* ---- Tablets & landscape phones (≤768px) ---- */
@media (max-width: 768px) {
    /* Timeline shifts to left-aligned */
    .timeline-track {
        left: 24px !important;
    }

    /* Disable cursor glow on touch devices */
    #cursor-glow {
        display: none !important;
    }

    /* Reduce section vertical spacing */
    section {
        padding-top: 5rem;
        padding-bottom: 5rem;
    }

    /* Stat cards smaller text */
    .stat-card .text-4xl {
        font-size: 1.75rem;
    }

    /* Project images slightly shorter */
    .project-img {
        height: 11rem;
    }

    /* Timeline items no longer alternate */
    .timeline-item {
        flex-direction: column !important;
    }
    .timeline-item > div:first-child {
        width: 100% !important;
        text-align: left !important;
        padding-right: 0 !important;
        padding-left: 3.5rem !important;
        margin-bottom: 0.5rem !important;
    }
    .timeline-item > div:last-child {
        width: 100% !important;
        padding-left: 3.5rem !important;
    }

    /* Contact info cards */
    .glass-card.rounded-xl {
        padding: 1rem;
    }

    /* Grid overlay lighter on mobile */
    .grid-overlay {
        background-size: 50px 50px;
    }

    /* Projects — native swipe carousel on mobile */
    .projects-track {
        overflow-x: auto !important;
        scroll-snap-type: x mandatory;
        -webkit-overflow-scrolling: touch;
        padding-bottom: 1rem;
    }
    .project-card {
        scroll-snap-align: start;
        flex-shrink: 0;
    }

    /* Navbar always has bg on mobile */
    #navbar {
        background: rgba(9, 9, 11, 0.9) !important;
        backdrop-filter: blur(16px) !important;
        -webkit-backdrop-filter: blur(16px) !important;
    }
}

/* ---- Phones (≤480px) ---- */
@media (max-width: 480px) {
    /* Hero section tighter spacing */
    #hero {
        padding-left: 1rem;
        padding-right: 1rem;
    }

    /* Smaller section label tracking */
    .about-header p,
    .services-header p,
    .experience-header p,
    .contact-header p {
        font-size: 11px;
        letter-spacing: 0.15em;
    }

    /* Services card padding */
    .service-card > div {
        padding: 1.25rem;
    }

    /* Tech tags wrap better */
    .tech-tag {
        padding: 4px 10px;
        font-size: 11px;
    }

    /* Stat cards compact */
    .stat-card {
        padding: 1rem !important;
    }
    .stat-card .text-4xl,
    .stat-card span.text-4xl {
        font-size: 1.5rem !important;
    }
    .stat-card p {
        font-size: 11px;
    }

    /* Form inputs touch-friendly */
    .contact-input {
        padding: 0.875rem 1rem;
        font-size: 16px; /* Prevents iOS zoom on focus */
    }

    /* Project card tags smaller */
    .project-card .text-\[11px\] {
        font-size: 10px;
        padding: 3px 8px;
    }

    /* Navbar compact */
    #navbar > div {
        padding-top: 0.75rem;
        padding-bottom: 0.75rem;
    }

    /* Footer */
    footer p {
        font-size: 12px;
    }
}

/* ---- Very small phones (≤375px) ---- */
@media (max-width: 375px) {
    /* Hero even smaller */
    .hero-title {
        font-size: 2rem !important;
        transform: translateY(40px);
    }

    .hero-subtitle {
        font-size: 10px !important;
    }

    .hero-tagline {
        font-size: 14px !important;
    }

    /* About stats single column on tiny screens */
    .about-stats {
        grid-template-columns: 1fr 1fr;
        gap: 0.5rem;
    }

    /* Reduce project card min width */
    .project-card {
        min-width: 240px !important;
    }
}

/* ---- Mobile viewport height fix (accounts for mobile browser chrome) ---- */
@supports (height: 100dvh) {
    #hero {
        min-height: 100dvh;
    }
}

/* ---- Touch device optimizations ---- */
@media (hover: none) and (pointer: coarse) {
    /* Disable hover effects that don't work on touch */
    .glass-card:hover {
        transform: none;
    }

    .service-glow {
        display: none;
    }

    /* Make tap targets at least 44px */
    .nav-link,
    .mobile-link {
        min-height: 44px;
        display: flex;
        align-items: center;
    }

    /* Disable 3D tilt on touch */
    .service-card {
        transform: none !important;
    }
}