/* ===== prototype.st — Grainy-Textured Prototype Studio ===== */
/* Fonts: "Inter" (Google Fonts), "Work Sans" (Google Fonts) */

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

:root {
    --deep-midnight: #0D1B2A;
    --warm-gold: #E8B84C;
    --pale-frost: #D8E2F0;
    --storm-blue: #1B3A5C;
    --copper-bright: #E8734A;
    --dark-steel: #151D28;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    font-weight: 400;
    font-size: 1rem;
    line-height: 1.65;
    color: var(--pale-frost);
    background-color: var(--deep-midnight);
    overflow-x: hidden;
    position: relative;
}

/* ----- Grain Texture Overlay ----- */
#grain-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9999;
    opacity: 0.06;
    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='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
    background-repeat: repeat;
    background-size: 256px 256px;
}

/* ----- Header ----- */
#site-header {
    padding: 5rem 2rem 3rem;
    text-align: center;
    position: relative;
}

.site-title {
    font-family: 'Work Sans', sans-serif;
    font-weight: 800;
    font-size: clamp(2.5rem, 6vw, 5rem);
    color: var(--pale-frost);
    letter-spacing: -0.02em;
    line-height: 1.1;
}

.accent-dot {
    color: var(--warm-gold);
}

.site-tagline {
    font-family: 'Inter', sans-serif;
    font-size: 1.1rem;
    color: var(--warm-gold);
    margin-top: 0.75rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    font-weight: 500;
}

/* ----- Icon Navigation ----- */
#icon-nav {
    padding: 1.5rem 2rem;
    display: flex;
    justify-content: center;
}

.nav-icons {
    list-style: none;
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
    justify-content: center;
}

.nav-icon-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.35rem;
    cursor: pointer;
    color: var(--pale-frost);
    opacity: 0.5;
    transition: opacity 0.3s ease, color 0.3s ease, transform 0.3s ease;
    padding: 0.5rem 0.75rem;
    border-radius: 6px;
    user-select: none;
}

.nav-icon-item:hover {
    opacity: 0.85;
    transform: translateY(-2px);
}

.nav-icon-item.active {
    opacity: 1;
    color: var(--warm-gold);
}

.nav-icon-item span {
    font-family: 'Inter', sans-serif;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight: 500;
}

/* ----- Diagonal Cuts ----- */
.diagonal-cut {
    width: 100%;
    height: 80px;
    position: relative;
    z-index: 1;
}

.diagonal-cut--top {
    background: var(--deep-midnight);
    clip-path: polygon(0 0, 100% 0, 100% 30%, 0 100%);
    margin-bottom: -1px;
}

.diagonal-cut--bottom {
    background: var(--deep-midnight);
    clip-path: polygon(0 70%, 100% 0, 100% 100%, 0 100%);
    margin-top: -1px;
}

/* ----- Main Prototype Grid (Organic Flow) ----- */
#prototype-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 2.5rem;
    padding: 2rem 3rem 4rem;
    max-width: 1400px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}

/* ----- Prototype Cards ----- */
.proto-card {
    background-color: var(--storm-blue);
    border-radius: 4px;
    padding: 2rem 1.75rem;
    position: relative;
    overflow: hidden;
    transition: transform 0.35s ease, box-shadow 0.35s ease;
    opacity: 0;
    animation: fadeInCard 0.6s ease forwards;
    border: 1px solid rgba(216, 226, 240, 0.06);
}

.proto-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--warm-gold), var(--copper-bright));
}

.proto-card:hover {
    transform: rotate(0deg) translateY(-4px) !important;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
}

/* Rotation classes */
.rotate-neg1 { transform: rotate(-1deg); }
.rotate-neg2 { transform: rotate(-2deg); }
.rotate-pos1 { transform: rotate(1deg); }
.rotate-pos2 { transform: rotate(2deg); }

/* Stagger card animations */
.proto-card:nth-child(1) { animation-delay: 0.05s; }
.proto-card:nth-child(2) { animation-delay: 0.1s; }
.proto-card:nth-child(3) { animation-delay: 0.15s; }
.proto-card:nth-child(4) { animation-delay: 0.2s; }
.proto-card:nth-child(5) { animation-delay: 0.25s; }
.proto-card:nth-child(6) { animation-delay: 0.3s; }
.proto-card:nth-child(7) { animation-delay: 0.35s; }
.proto-card:nth-child(8) { animation-delay: 0.4s; }

@keyframes fadeInCard {
    from {
        opacity: 0;
        transform: translateY(20px) rotate(0deg);
    }
    to {
        opacity: 1;
    }
}

.card-stamp {
    font-family: 'Work Sans', sans-serif;
    font-weight: 700;
    font-size: 0.65rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--copper-bright);
    margin-bottom: 1rem;
    opacity: 0.8;
}

.card-title {
    font-family: 'Work Sans', sans-serif;
    font-weight: 800;
    font-size: 1.5rem;
    line-height: 1.2;
    color: var(--pale-frost);
    margin-bottom: 0.75rem;
}

.card-meta {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.card-tag {
    font-family: 'Inter', sans-serif;
    font-size: 0.7rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--deep-midnight);
    background-color: var(--warm-gold);
    padding: 0.2rem 0.6rem;
    border-radius: 2px;
}

.card-date {
    font-family: 'Inter', sans-serif;
    font-size: 0.75rem;
    color: var(--pale-frost);
    opacity: 0.5;
}

.card-desc {
    font-family: 'Inter', sans-serif;
    font-size: 0.9rem;
    line-height: 1.65;
    color: var(--pale-frost);
    opacity: 0.8;
    margin-bottom: 1.5rem;
}

.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid rgba(216, 226, 240, 0.1);
    padding-top: 1rem;
}

.card-version {
    font-family: 'Inter', sans-serif;
    font-size: 0.75rem;
    color: var(--warm-gold);
    opacity: 0.7;
    letter-spacing: 0.05em;
}

.card-action {
    font-family: 'Inter', sans-serif;
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--copper-bright);
    background: none;
    border: 1px solid var(--copper-bright);
    padding: 0.4rem 1rem;
    border-radius: 2px;
    cursor: pointer;
    transition: background-color 0.25s ease, color 0.25s ease;
}

.card-action:hover {
    background-color: var(--copper-bright);
    color: var(--deep-midnight);
}

/* ----- Shake Error Animation ----- */
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-4px); }
    20%, 40%, 60%, 80% { transform: translateX(4px); }
}

.shake-error {
    animation: shake 0.5s ease;
}

/* ----- Card hidden by filter ----- */
.proto-card.hidden {
    display: none;
}

/* ----- Footer ----- */
#site-footer {
    background-color: var(--dark-steel);
    padding: 3.5rem 2rem;
    text-align: center;
    position: relative;
}

.footer-text {
    font-family: 'Work Sans', sans-serif;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--pale-frost);
    margin-bottom: 0.5rem;
}

.footer-sub {
    font-family: 'Inter', sans-serif;
    font-size: 0.85rem;
    color: var(--pale-frost);
    opacity: 0.4;
}

/* ----- Responsive ----- */
@media (max-width: 768px) {
    #prototype-grid {
        grid-template-columns: 1fr;
        padding: 2rem 1.5rem;
        gap: 2rem;
    }

    #site-header {
        padding: 3rem 1.5rem 2rem;
    }

    .nav-icons {
        gap: 1rem;
    }

    .diagonal-cut {
        height: 50px;
    }
}

@media (max-width: 480px) {
    .site-title {
        font-size: 2.2rem;
    }

    .proto-card {
        padding: 1.5rem 1.25rem;
    }

    .card-title {
        font-size: 1.25rem;
    }
}