/* ═══════════════════════════════════════════════════════════
   ScanPDF.
   Custom styles & animations to supplement Tailwind CSS
   ═══════════════════════════════════════════════════════════ */

/* ─── Keyframes ────────────────────────────────────────── */

@keyframes fade-in-up {
    from { opacity: 0; transform: translateY(20px); }
    to   { opacity: 1; transform: translateY(0); }
}

@keyframes pulse-slow {
    0%, 100% { opacity: 0.3; transform: scale(1); }
    50%      { opacity: 0.6; transform: scale(1.08); }
}

@keyframes scroll-dot {
    0%   { opacity: 1; transform: translateY(0); }
    100% { opacity: 0; transform: translateY(6px); }
}

@keyframes progress-bar {
    0%   { width: 0%;  }
    15%  { width: 12%; }
    35%  { width: 35%; }
    55%  { width: 50%; }
    75%  { width: 70%; }
    90%  { width: 85%; }
    100% { width: 95%; }
}

@keyframes success-pop {
    0%  { opacity: 0; transform: scale(0.6); }
    50% { transform: scale(1.08); }
    100%{ opacity: 1; transform: scale(1); }
}

@keyframes shimmer {
    0%   { background-position: -200% center; }
    100% { background-position: 200% center; }
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50%      { transform: translateY(-6px); }
}

/* ─── Animation Utilities ──────────────────────────────── */

.animate-fade-in-up {
    animation: fade-in-up 0.7s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    opacity: 0;
}

.animation-delay-100 { animation-delay: 0.1s; }
.animation-delay-200 { animation-delay: 0.2s; }
.animation-delay-300 { animation-delay: 0.3s; }
.animation-delay-400 { animation-delay: 0.4s; }

.animate-pulse-slow {
    animation: pulse-slow 8s ease-in-out infinite;
}

.animate-pulse-slow-delayed {
    animation: pulse-slow 8s ease-in-out infinite;
    animation-delay: 4s;
}

.animate-scroll-dot {
    animation: scroll-dot 1.5s ease-in-out infinite;
}

.animate-progress-bar {
    animation: progress-bar 10s ease-out forwards;
}

.animate-success-pop {
    animation: success-pop 0.45s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.animate-float {
    animation: float 4s ease-in-out infinite;
}

/* ─── Base ─────────────────────────────────────────────── */

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    text-rendering: optimizeLegibility;
    /* Prevent horizontal overflow on mobile */
    overflow-x: hidden;
}

/* ─── Navbar ───────────────────────────────────────────── */

#navbar {
    background: transparent;
}

#navbar.scrolled {
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(16px) saturate(180%);
    -webkit-backdrop-filter: blur(16px) saturate(180%);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04),
                0 4px 24px rgba(0, 0, 0, 0.03);
}

/* ─── Scrollbar ────────────────────────────────────────── */

::-webkit-scrollbar {
    width: 7px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: #c7d2fe;
    border-radius: 100px;
}

::-webkit-scrollbar-thumb:hover {
    background: #a5b4fc;
}

/* ─── Selection ────────────────────────────────────────── */

::selection {
    background: rgba(99, 102, 241, 0.12);
    color: #1e293b;
}

/* ─── Drop Zone ────────────────────────────────────────── */

#drop-zone.drag-over {
    border-color: #818cf8 !important;
    background: rgba(238, 242, 255, 0.5) !important;
}

/* ─── Tool Card Stagger ────────────────────────────────── */

.tool-card:nth-child(1) { animation-delay: 0.04s; }
.tool-card:nth-child(2) { animation-delay: 0.08s; }
.tool-card:nth-child(3) { animation-delay: 0.12s; }
.tool-card:nth-child(4) { animation-delay: 0.16s; }
.tool-card:nth-child(5) { animation-delay: 0.20s; }
.tool-card:nth-child(6) { animation-delay: 0.24s; }
.tool-card:nth-child(7) { animation-delay: 0.28s; }
.tool-card:nth-child(8) { animation-delay: 0.32s; }
.tool-card:nth-child(9) { animation-delay: 0.36s; }
.tool-card:nth-child(10) { animation-delay: 0.40s; }
.tool-card:nth-child(11) { animation-delay: 0.44s; }
.tool-card:nth-child(12) { animation-delay: 0.48s; }
.tool-card:nth-child(13) { animation-delay: 0.52s; }
.tool-card:nth-child(14) { animation-delay: 0.56s; }
.tool-card:nth-child(15) { animation-delay: 0.60s; }
.tool-card:nth-child(16) { animation-delay: 0.64s; }

/* ─── Focus ────────────────────────────────────────────── */

*:focus-visible {
    outline: 2px solid rgba(99, 102, 241, 0.4);
    outline-offset: 2px;
    border-radius: 4px;
}

/* ─── Mobile Responsive Overrides ──────────────────────── */

@media (max-width: 640px) {
    #hero h1 {
        font-size: 2.25rem;
        line-height: 1.1;
    }

    .tool-card {
        animation-delay: 0s !important;
    }

    /* Better touch targets on mobile */
    button, a {
        -webkit-tap-highlight-color: rgba(99, 102, 241, 0.08);
    }

    /* Prevent horizontal scroll */
    section {
        overflow-x: hidden;
    }
}

@media (max-width: 475px) {
    #hero h1 {
        font-size: 2rem;
        line-height: 1.12;
    }
}

/* ─── Shimmer ──────────────────────────────────────────── */

.shimmer {
    background: linear-gradient(
        90deg,
        transparent 0%,
        rgba(99, 102, 241, 0.03) 50%,
        transparent 100%
    );
    background-size: 200% 100%;
    animation: shimmer 2.5s infinite;
}

/* ─── Transition Defaults ──────────────────────────────── */

a, button {
    transition-timing-function: cubic-bezier(0.16, 1, 0.3, 1);
}

/* ─── Safe areas for notched phones ────────────────────── */

@supports (padding: env(safe-area-inset-bottom)) {
    footer {
        padding-bottom: env(safe-area-inset-bottom);
    }
    #navbar {
        padding-top: env(safe-area-inset-top);
    }
}