/* ============================================================
   Repulse — Monochrome Design System
   Black & white tones · transform/opacity only · 150-300ms motion
   ============================================================ */

:root {
    /* Surfaces */
    --bg: #080808;
    --bg-elev: #0d0d0d;
    --surface: #131313;
    --surface-2: #191919;
    --surface-3: #202020;

    /* Lines */
    --border: rgba(255, 255, 255, 0.08);
    --border-strong: rgba(255, 255, 255, 0.18);

    /* Text */
    --text: #f4f4f4;
    --text-2: #a3a3a3;
    --text-3: #6e6e6e;

    /* Accent (monochrome) */
    --white: #ffffff;
    --black: #000000;

    /* Motion */
    --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
    --dur-fast: 160ms;
    --dur: 260ms;
    --dur-slow: 420ms;

    /* Type */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
}

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

html {
    scroll-behavior: smooth;
    /* The design is built for a viewport ~25% larger than a typical screen;
       at 100% browser zoom the hero feels flat/oversized. Scaling the root
       to 80% reproduces exactly what the user confirmed looks right at 80%
       browser zoom. Tune --site-zoom in one place. */
    zoom: var(--site-zoom, 0.8);
}

body {
    font-family: var(--font-sans);
    background: var(--bg);
    color: var(--text);
    overflow-x: hidden;
    min-height: 100vh;
    font-weight: 400;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

/* ---------- Background texture ---------- */

.bg-grid {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.028) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.028) 1px, transparent 1px);
    background-size: 72px 72px;
    mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, black 30%, transparent 75%);
    -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, black 30%, transparent 75%);
}

.bg-glow {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background:
        radial-gradient(ellipse 55% 40% at 50% -5%, rgba(255, 255, 255, 0.07), transparent 70%),
        radial-gradient(ellipse 40% 35% at 90% 110%, rgba(255, 255, 255, 0.035), transparent 70%);
}

/* ---------- Container ---------- */

.container {
    position: relative;
    z-index: 10;
    min-height: 100vh;
    max-width: 1360px;
    margin: 0 auto;
    padding: 1.5rem 2rem 4rem;
}

/* ---------- Header ---------- */

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
    margin: 0.5rem 0 4rem;
    padding: 1rem 1.25rem;
    border: 1px solid var(--border);
    border-radius: 18px;
    background: rgba(13, 13, 13, 0.72);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    transition: border-color var(--dur) ease, box-shadow var(--dur) ease,
        background var(--dur) ease;
}

.header.scrolled {
    border-color: var(--border-strong);
    background: rgba(13, 13, 13, 0.92);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.45);
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    text-decoration: none;
    color: var(--text);
    transition: opacity var(--dur-fast) ease;
}

.logo:hover {
    opacity: 0.85;
}

.logo-svg {
    flex-shrink: 0;
    filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.6));
    transition: transform var(--dur) var(--ease-spring);
}

.logo:hover .logo-svg {
    transform: rotate(-4deg) scale(1.04);
}

.logo-text {
    font-size: 1.4rem;
    font-weight: 800;
    letter-spacing: -0.03em;
}

.nav {
    display: flex;
    gap: 0.5rem;
    padding: 0.3rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border);
    border-radius: 14px;
}

.nav-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    padding: 0.6rem 1.15rem;
    background: transparent;
    border: none;
    border-radius: 10px;
    color: var(--text-3);
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: color var(--dur-fast) ease, background var(--dur-fast) ease;
}

.nav-btn svg {
    opacity: 0.7;
    transition: opacity var(--dur-fast) ease;
}

.nav-btn:hover {
    color: var(--text-2);
    background: rgba(255, 255, 255, 0.04);
}

.nav-btn.active {
    color: var(--black);
    background: var(--white);
}

.nav-btn.active svg {
    opacity: 1;
}

/* ---------- Pages ---------- */

.page {
    display: none;
}

.page.active {
    display: block;
}

/* ---------- Hero ---------- */

.hero-section {
    padding: 1.5rem 0 3rem;
}

.hero-split {
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    gap: 4.5rem;
    align-items: center;
}

.hero-content {
    display: flex;
    flex-direction: column;
    gap: 1.75rem;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    width: fit-content;
    padding: 0.45rem 1.05rem;
    border: 1px solid var(--border-strong);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-2);
    font-family: var(--font-mono);
    font-size: 0.78rem;
    font-weight: 500;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.badge-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--white);
    box-shadow: 0 0 0 0 rgba(255, 255, 255, 0.5);
    animation: badgePulse 2.4s var(--ease-out) infinite;
}

@keyframes badgePulse {
    0% { box-shadow: 0 0 0 0 rgba(255, 255, 255, 0.35); }
    70% { box-shadow: 0 0 0 7px rgba(255, 255, 255, 0); }
    100% { box-shadow: 0 0 0 0 rgba(255, 255, 255, 0); }
}

.main-title {
    font-size: clamp(2.75rem, 6vw, 5rem);
    font-weight: 800;
    line-height: 1.04;
    letter-spacing: -0.035em;
}

.title-line {
    display: block;
    color: var(--text);
    opacity: 0.88;
}

.title-line.highlight {
    color: var(--white);
    position: relative;
    width: fit-content;
}

.title-line.highlight::after {
    content: '';
    position: absolute;
    left: 2px;
    right: 2px;
    bottom: 0.08em;
    height: 0.32em;
    background: rgba(255, 255, 255, 0.1);
    z-index: -1;
    border-radius: 2px;
}

.subtitle {
    font-size: 1.05rem;
    color: var(--text-2);
    line-height: 1.75;
    max-width: 34rem;
}

/* ---------- Search ---------- */

.search-container {
    position: relative;
    margin-top: 0.75rem;
}

.search-box {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.95rem 1.25rem;
    background: var(--surface);
    border: 1px solid var(--border-strong);
    border-radius: 16px;
    transition: border-color var(--dur) ease, box-shadow var(--dur) ease,
        background var(--dur) ease;
}

.search-box:focus-within {
    border-color: rgba(255, 255, 255, 0.55);
    background: var(--surface-2);
    box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.06), 0 18px 50px rgba(0, 0, 0, 0.55);
}

.search-icon {
    color: var(--text-3);
    flex-shrink: 0;
    transition: color var(--dur-fast) ease;
}

.search-box:focus-within .search-icon {
    color: var(--text);
}

#search-input {
    flex: 1;
    min-width: 0;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text);
    font-family: inherit;
    font-size: 1.05rem;
    font-weight: 400;
    padding: 0.35rem 0;
}

#search-input::placeholder {
    color: var(--text-3);
}

.search-button {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.7rem 1.6rem;
    background: var(--white);
    border: none;
    border-radius: 11px;
    color: var(--black);
    font-family: inherit;
    font-weight: 700;
    font-size: 0.95rem;
    cursor: pointer;
    transition: transform var(--dur-fast) var(--ease-out), opacity var(--dur-fast) ease;
    flex-shrink: 0;
}

.search-button:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

.search-button:active {
    transform: translateY(0) scale(0.98);
}

.search-filters-container {
    margin-top: 0.85rem;
}

.search-hint {
    display: flex;
    align-items: center;
    gap: 0.55rem;
    margin-top: 1rem;
    color: var(--text-3);
    font-size: 0.85rem;
}

.search-hint svg {
    flex-shrink: 0;
}

/* ---------- Terminal visual ---------- */

.hero-terminal {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.terminal-window {
    width: 100%;
    max-width: 480px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 18px;
    overflow: hidden;
    box-shadow: 0 30px 90px rgba(0, 0, 0, 0.65), 0 2px 0 rgba(255, 255, 255, 0.04) inset;
}

.terminal-bar {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.8rem 1.1rem;
    background: var(--bg-elev);
    border-bottom: 1px solid var(--border);
}

.term-dot {
    width: 11px;
    height: 11px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.14);
}

.term-title {
    margin-left: 0.5rem;
    color: var(--text-3);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.02em;
}

.terminal-body {
    padding: 1.4rem 1.3rem 1.6rem;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    font-family: var(--font-mono);
    font-size: 0.84rem;
    line-height: 1.7;
}

.term-line {
    display: flex;
    gap: 0.6rem;
    min-height: 1.4em;
}

.term-line.dim {
    color: var(--text-3);
}

.term-line.ok {
    color: var(--text-2);
}

.term-prompt {
    color: var(--white);
    font-weight: 600;
    flex-shrink: 0;
}

.term-cursor {
    display: inline-block;
    width: 8px;
    height: 1.05em;
    background: var(--white);
    vertical-align: -0.15em;
    animation: cursorBlink 1.1s steps(2) infinite;
}

@keyframes cursorBlink {
    50% { opacity: 0; }
}

.terminal-caption {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-3);
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

/* ---------- Results ---------- */

.results-section {
    margin-top: 4.5rem;
    display: none;
}

.results-section.active {
    display: block;
}

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 1rem;
    margin-bottom: 1.75rem;
    padding-bottom: 1.1rem;
    border-bottom: 1px solid var(--border);
}

.results-title {
    font-size: 1.35rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.results-sub {
    color: var(--text-3);
    font-size: 0.85rem;
    font-family: var(--font-mono);
}

.results-count {
    color: var(--text-3);
    font-size: 0.9rem;
    font-family: var(--font-mono);
}

.results-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(330px, 1fr));
    gap: 1.4rem;
}

/* ---------- Repo card ---------- */

.repo-card {
    position: relative;
    display: flex;
    flex-direction: column;
    padding: 1.6rem 1.6rem 1.4rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    overflow: hidden;
    transition: transform var(--dur) var(--ease-out), border-color var(--dur) ease,
        background var(--dur) ease, box-shadow var(--dur) ease;
    will-change: transform;
}

.repo-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--white);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--dur-slow) var(--ease-out);
}

.repo-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-strong);
    background: var(--surface-2);
    box-shadow: 0 20px 45px rgba(0, 0, 0, 0.5);
}

.repo-card:hover::before {
    transform: scaleX(1);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 0.8rem;
}

.repo-name {
    font-size: 1.1rem;
    font-weight: 700;
    line-height: 1.35;
    letter-spacing: -0.015em;
    word-break: break-word;
}

.like-btn {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--text-3);
    cursor: pointer;
    transition: color var(--dur-fast) ease, border-color var(--dur-fast) ease,
        background var(--dur-fast) ease;
}

.like-btn:hover {
    color: var(--text);
    border-color: var(--border-strong);
    background: rgba(255, 255, 255, 0.07);
}

.like-btn.liked {
    color: var(--white);
    background: var(--white);
    border-color: var(--white);
}

.like-btn.liked svg path {
    stroke: var(--black);
    fill: var(--black);
}

.repo-description {
    color: var(--text-2);
    font-size: 0.92rem;
    line-height: 1.65;
    margin-bottom: 1rem;
    min-height: 3.2em;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.repo-topics {
    display: flex;
    gap: 0.45rem;
    flex-wrap: wrap;
    margin-bottom: 1.1rem;
}

.repo-match {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: #a3e635;
    margin-bottom: 0.8rem;
    opacity: 0.9;
}

.repo-topic {
    padding: 0.28rem 0.7rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border);
    border-radius: 999px;
    color: var(--text-2);
    font-family: var(--font-mono);
    font-size: 0.72rem;
    transition: border-color var(--dur-fast) ease, color var(--dur-fast) ease,
        background var(--dur-fast) ease;
}

.repo-topic:hover {
    color: var(--text);
    border-color: var(--border-strong);
    background: rgba(255, 255, 255, 0.08);
}

.repo-stats {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
    margin-bottom: 1.2rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
}

.repo-stat {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    color: var(--text-3);
    font-family: var(--font-mono);
    font-size: 0.8rem;
}

.repo-stat svg {
    width: 15px;
    height: 15px;
    color: var(--text-2);
}

.repo-url {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    color: var(--text);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 600;
    width: fit-content;
    transition: gap var(--dur) var(--ease-out), opacity var(--dur-fast) ease;
}

.repo-url:hover {
    gap: 0.85rem;
    opacity: 0.8;
}

/* ---------- Empty state ---------- */

.repo-card.empty-state {
    align-items: center;
    justify-content: center;
    text-align: center;
    gap: 1.1rem;
    padding: 4rem 2rem;
    grid-column: 1 / -1;
    background: transparent;
    border-style: dashed;
}

.empty-state svg {
    color: var(--text-3);
    opacity: 0.6;
}

.empty-state h3 {
    color: var(--text);
    font-size: 1.35rem;
}

.empty-state p {
    color: var(--text-3);
    font-size: 0.95rem;
}

.empty-state button {
    margin-top: 0.5rem;
    padding: 0.75rem 1.6rem;
    background: var(--white);
    border: none;
    border-radius: 11px;
    color: var(--black);
    font-family: inherit;
    font-weight: 700;
    font-size: 0.92rem;
    cursor: pointer;
    transition: opacity var(--dur-fast) ease, transform var(--dur-fast) var(--ease-out);
}

.empty-state button:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

/* ---------- Security page ---------- */

.security-content {
    max-width: 1100px;
    margin: 0 auto;
    padding: 1.5rem 0 2rem;
}

.security-title {
    font-size: clamp(2.25rem, 4.5vw, 3.25rem);
    font-weight: 800;
    text-align: center;
    letter-spacing: -0.03em;
    margin-bottom: 3.5rem;
}

.security-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.4rem;
    margin-bottom: 3.5rem;
}

.security-card {
    padding: 2.2rem 1.8rem;
    text-align: center;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    transition: transform var(--dur) var(--ease-out), border-color var(--dur) ease,
        background var(--dur) ease;
}

.security-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-strong);
    background: var(--surface-2);
}

.card-icon {
    display: flex;
    justify-content: center;
    margin-bottom: 1.3rem;
    color: var(--text);
}

.card-icon svg {
    opacity: 0.85;
}

.security-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 0.7rem;
    letter-spacing: -0.01em;
}

.security-card p {
    color: var(--text-2);
    font-size: 0.92rem;
    line-height: 1.7;
}

.security-info {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 3rem;
    margin-bottom: 1.75rem;
}

.security-info h3 {
    font-size: 1.5rem;
    font-weight: 700;
    text-align: center;
    letter-spacing: -0.02em;
    margin-bottom: 2.5rem;
}

.info-steps {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.step {
    display: flex;
    gap: 1.75rem;
    align-items: flex-start;
}

.step-number {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 52px;
    height: 52px;
    flex-shrink: 0;
    background: var(--white);
    color: var(--black);
    border-radius: 12px;
    font-family: var(--font-mono);
    font-size: 1rem;
    font-weight: 600;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
}

.step-content h4 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.4rem;
}

.step-content p {
    color: var(--text-2);
    line-height: 1.7;
    font-size: 0.95rem;
}

.security-note {
    border: 1px solid var(--border-strong);
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.03);
    padding: 1.5rem 1.75rem;
}

.security-note p {
    color: var(--text-2);
    line-height: 1.85;
    font-size: 0.97rem;
}

.security-note strong {
    color: var(--text);
}

/* ---------- Favorites page ---------- */

.favorites-content {
    max-width: 1100px;
    margin: 0 auto;
    padding: 1.5rem 0 2rem;
}

.section-title {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    text-align: center;
    font-size: 1.75rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 1.25rem;
}

#favorites-count {
    text-align: center;
    margin-bottom: 2rem;
    color: var(--text-3);
}

/* ---------- Loading overlay ---------- */

.loading-overlay {
    position: fixed;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1.1rem;
    background: rgba(8, 8, 8, 0.88);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 9999;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--dur-fast) ease;
}

.loading-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.loader {
    display: flex;
    justify-content: center;
}

.loader-ring {
    width: 34px;
    height: 34px;
    border: 2px solid rgba(255, 255, 255, 0.12);
    border-top-color: var(--white);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-text {
    color: var(--text-2);
    font-size: 0.95rem;
    font-family: var(--font-mono);
}

/* ---------- Reduced motion ---------- */

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ---------- Responsive ---------- */

@media (max-width: 1024px) {
    .hero-split {
        grid-template-columns: 1fr;
        gap: 3.5rem;
    }

    .hero-terminal {
        order: 2;
    }

    .terminal-window {
        max-width: 100%;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 1rem 1.1rem 3rem;
    }

    .header {
        flex-direction: column;
        gap: 1rem;
        margin-bottom: 2.5rem;
    }

    .nav {
        width: 100%;
        justify-content: center;
    }

    .nav-btn {
        flex: 1;
        justify-content: center;
        padding: 0.65rem 0.5rem;
    }

    .nav-btn span {
        font-size: 0.85rem;
    }

    .main-title {
        font-size: 2.6rem;
    }

    .search-box {
        flex-wrap: wrap;
        padding: 0.85rem;
    }

    #search-input {
        flex-basis: 100%;
    }

    .search-button {
        width: 100%;
        justify-content: center;
    }

    .results-container {
        grid-template-columns: 1fr;
    }

    .security-info {
        padding: 2rem 1.5rem;
    }

    .step {
        flex-direction: column;
        gap: 1rem;
        text-align: left;
    }

    .results-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.35rem;
    }
}