/*
 * TaskPoint - Self-hosted Task Manager
 * Copyright (c) 2025-2026 Koziyanchuk Nikita
 * All rights reserved.
 * Distribution, copying and modification are prohibited
 * without the author's written consent.
 */

:root {
    --font-display: 'Unbounded', 'Onest', sans-serif;
    --font-body: 'Onest', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'Courier New', monospace;
    --bg: #0B0F0C;
    --surface: #121713;
    --surface-2: #171E19;
    --ink: #E8EEE9;
    --muted: #8A988E;
    --hairline: #232A25;
    --hairline-strong: #39433C;
    --signal: #2FD673;
    --signal-deep: #25B95E;
    --signal-soft: rgba(47, 214, 115, 0.1);
    --on-signal: #06110A;
    --overlay: rgba(4, 7, 5, 0.7);
    --grain-opacity: 0.05;
    --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

[data-theme="light"] {
    --bg: #F4F4F0;
    --surface: #FFFFFF;
    --surface-2: #FAFAF7;
    --ink: #111813;
    --muted: #5A665E;
    --hairline: #DADDD5;
    --hairline-strong: #B8BDB4;
    --signal: #0FA958;
    --signal-deep: #0B7A41;
    --signal-soft: rgba(15, 169, 88, 0.08);
    --on-signal: #FFFFFF;
    --grain-opacity: 0.032;
}

/* ---- Reset ---- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 125%; }
body {
    font-family: var(--font-body);
    background-color: var(--bg);
    color: var(--ink);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}
body::after {
    content: '';
    position: fixed; inset: 0; z-index: 3000;
    pointer-events: none;
    opacity: var(--grain-opacity);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
::selection { background: var(--signal); color: var(--on-signal); }
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--hairline-strong); }
::-webkit-scrollbar-thumb:hover { background: var(--signal); }

/* ---- Nav ---- */
.nav {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    background: var(--surface);
    border-bottom: 1px solid var(--hairline);
    padding: 0 2rem;
}
.nav-inner {
    max-width: 75rem; margin: 0 auto;
    display: flex; align-items: center; justify-content: space-between;
    height: 3.5rem;
}
.nav-logo {
    font-family: var(--font-display);
    font-size: 1.05rem; font-weight: 700;
    color: var(--signal); text-decoration: none;
    letter-spacing: -0.02em;
}
.nav-links {
    display: flex; align-items: center; gap: 1.5rem;
    list-style: none;
}
.nav-links a {
    font-family: var(--font-mono);
    font-size: 0.5625rem; font-weight: 600;
    letter-spacing: 0.1em; text-transform: uppercase;
    color: var(--muted); text-decoration: none;
    transition: color 0.2s;
}
.nav-links a:hover { color: var(--signal); }
.theme-toggle {
    background: none; border: 1px solid var(--hairline-strong);
    font-size: 0.75rem; cursor: pointer;
    padding: 0.2rem 0.35rem; line-height: 1;
    transition: border-color 0.2s, background 0.2s;
    display: flex; align-items: center; justify-content: center;
}
.theme-toggle:hover {
    border-color: var(--signal);
    background: var(--surface-2);
}

/* ---- Section Base ---- */
.section {
    padding: 5rem 2rem;
    max-width: 75rem;
    margin: 0 auto;
}
.section-label {
    font-family: var(--font-mono);
    font-size: 0.5625rem; font-weight: 700;
    letter-spacing: 0.16em; text-transform: uppercase;
    color: var(--signal);
    margin-bottom: 0.5rem;
}
.section-title {
    font-family: var(--font-display);
    font-size: 2rem; font-weight: 700;
    letter-spacing: -0.03em; line-height: 1.2;
    margin-bottom: 1rem;
}
.section-subtitle {
    font-size: 1rem; color: var(--muted);
    max-width: 36rem; line-height: 1.5;
}

/* ---- Hero ---- */
.hero {
    min-height: 100vh;
    display: flex; flex-direction: column;
    align-items: center; justify-content: center;
    text-align: center;
    padding: 6rem 2rem 4rem;
    position: relative;
}
.hero-badge {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.5625rem; font-weight: 700;
    letter-spacing: 0.16em; text-transform: uppercase;
    color: var(--signal);
    border: 1px solid var(--signal-soft);
    background: var(--signal-soft);
    padding: 0.35rem 0.75rem;
    margin-bottom: 1.5rem;
}
.hero-title {
    font-family: var(--font-display);
    font-size: 3.5rem; font-weight: 800;
    letter-spacing: -0.04em; line-height: 1.1;
    margin-bottom: 1rem;
    max-width: 48rem;
}
.hero-title em {
    font-style: normal;
    color: var(--signal);
}
.hero-desc {
    font-size: 1.05rem; color: var(--muted);
    max-width: 32rem; line-height: 1.6;
    margin-bottom: 2.5rem;
}
.hero-actions {
    display: flex; gap: 0.75rem; flex-wrap: wrap; justify-content: center;
}
.btn {
    display: inline-flex; align-items: center; gap: 0.4rem;
    font-family: var(--font-mono);
    font-size: 0.625rem; font-weight: 700;
    letter-spacing: 0.08em; text-transform: uppercase;
    padding: 0.65rem 1.25rem;
    border: 1px solid var(--hairline-strong);
    background: var(--surface);
    color: var(--ink);
    cursor: pointer;
    text-decoration: none;
    transition: border-color 0.2s, background 0.2s, color 0.2s;
}
.btn:hover {
    border-color: var(--signal);
    background: var(--surface-2);
}
.btn-primary {
    background: var(--signal);
    color: var(--on-signal);
    border-color: var(--signal);
}
.btn-primary:hover {
    background: var(--signal-deep);
    border-color: var(--signal-deep);
}
.hero-scroll {
    position: absolute; bottom: 2rem; left: 50%; transform: translateX(-50%);
    opacity: 0.4; animation: bounce 2s infinite;
}
@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(8px); }
}

/* ---- Features Grid ---- */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1px;
    background: var(--hairline);
    border: 1px solid var(--hairline);
    margin-top: 2.5rem;
}
.feature-card {
    background: var(--surface);
    padding: 2rem 1.5rem;
    text-align: center;
}
.feature-icon {
    width: 2.5rem; height: 2.5rem;
    display: flex; align-items: center; justify-content: center;
    margin: 0 auto 1rem;
    border: 1px solid var(--hairline-strong);
    background: var(--surface-2);
    color: var(--signal);
}
.feature-card h3 {
    font-family: var(--font-display);
    font-size: 0.9rem; font-weight: 600;
    letter-spacing: -0.02em;
    margin-bottom: 0.4rem;
}
.feature-card p {
    font-size: 0.75rem; color: var(--muted); line-height: 1.45;
}

/* ---- Split Row (image + text) ---- */
.split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
    margin-top: 2.5rem;
}
.split.reverse { direction: rtl; }
.split.reverse > * { direction: ltr; }
.split-img {
    width: 100%;
    border: 1px solid var(--hairline-strong);
    display: block;
    cursor: pointer;
    transition: border-color 0.2s;
}
.split-img:hover { border-color: var(--signal); }
.split-text h3 {
    font-family: var(--font-display);
    font-size: 1.25rem; font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: 0.75rem;
}
.split-text p {
    font-size: 0.875rem; color: var(--muted); line-height: 1.6;
    margin-bottom: 1.25rem;
}
.split-tags {
    display: flex; gap: 0.4rem; flex-wrap: wrap;
}
.tag {
    font-family: var(--font-mono);
    font-size: 0.5rem; font-weight: 600;
    letter-spacing: 0.1em; text-transform: uppercase;
    color: var(--muted);
    border: 1px solid var(--hairline);
    padding: 0.2rem 0.5rem;
}

/* ---- Dual Image ---- */
.dual-images {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-top: 2.5rem;
}
.dual-img {
    width: 100%;
    border: 1px solid var(--hairline-strong);
    display: block;
    cursor: pointer;
    transition: border-color 0.2s;
}
.dual-img:hover { border-color: var(--signal); }
.dual-caption {
    font-family: var(--font-mono);
    font-size: 0.5rem; font-weight: 600;
    letter-spacing: 0.1em; text-transform: uppercase;
    color: var(--muted); text-align: center;
    margin-top: 0.5rem;
}

/* ---- Tech Stack ---- */
.tech-strip {
    display: flex; flex-wrap: wrap; justify-content: center; gap: 1.5rem 3rem;
    margin-top: 2.5rem;
    padding: 2.5rem 0;
    border-top: 1px solid var(--hairline);
    border-bottom: 1px solid var(--hairline);
}
.tech-item {
    text-align: center;
}
.tech-name {
    font-family: var(--font-display);
    font-size: 1.2rem; font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 0.15rem;
}
.tech-desc {
    font-family: var(--font-mono);
    font-size: 0.5rem; font-weight: 600;
    letter-spacing: 0.12em; text-transform: uppercase;
    color: var(--muted);
}
.tech-note {
    text-align: center; margin-top: 1.25rem;
    font-family: var(--font-mono);
    font-size: 0.5625rem; font-weight: 600;
    letter-spacing: 0.1em; text-transform: uppercase;
    color: var(--signal);
}

/* ---- Footer ---- */
.footer {
    text-align: center; padding: 1.5rem 2rem;
    border-top: 1px solid var(--hairline);
    font-family: var(--font-mono); font-size: 0.5625rem;
    letter-spacing: 0.08em; text-transform: uppercase;
    color: var(--muted);
}
.footer strong { color: var(--signal); }

/* ---- Section Divider ---- */
.section-divider {
    height: 1px; background: var(--hairline);
    max-width: 75rem; margin: 0 auto;
}

/* ---- Stats bar ---- */
.stats-bar {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1px;
    background: var(--hairline);
    border: 1px solid var(--hairline);
    margin-top: 2.5rem;
    text-align: center;
}
.stat-item {
    background: var(--surface);
    padding: 1.5rem;
}
.stat-value {
    font-family: var(--font-display);
    font-size: 1.5rem; font-weight: 700;
    letter-spacing: -0.03em;
    color: var(--signal);
}
.stat-label {
    font-family: var(--font-mono);
    font-size: 0.5rem; font-weight: 600;
    letter-spacing: 0.12em; text-transform: uppercase;
    color: var(--muted);
    margin-top: 0.35rem;
}

/* ---- Admin screenshots grid ---- */
.admin-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1.25rem;
    margin-top: 2rem;
}
.admin-shot img {
    width: 100%; border: 1px solid var(--hairline);
    transition: border-color 0.2s;
    cursor: pointer;
}
.admin-shot img:hover { border-color: var(--signal); }
.admin-shot .dual-caption { margin-top: 0.5rem; }

/* ---- Lightbox ---- */
.lightbox {
    position: fixed; inset: 0; z-index: 5000;
    background: rgba(4, 7, 5, 0.92);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex; align-items: flex-start; justify-content: center;
    overflow-y: auto; overflow-x: hidden;
    padding: 4rem 0;
    opacity: 0; pointer-events: none;
    transition: opacity 0.3s var(--ease-out);
}
.lightbox.open {
    opacity: 1; pointer-events: auto;
}
.lightbox-img {
    max-width: 70vw;
    border: 1px solid var(--hairline-strong);
    box-shadow: var(--card-hover-shadow);
    transform: scale(0.95);
    transition: transform 0.3s var(--ease-out);
    flex-shrink: 0;
}
.lightbox.open .lightbox-img { transform: scale(1); }
.lightbox-close {
    position: fixed; top: 1.5rem; right: 1.5rem;
    background: var(--surface); border: 1px solid var(--hairline-strong);
    font-size: 1.5rem; color: var(--muted); cursor: pointer;
    line-height: 1; transition: color 0.2s, border-color 0.2s;
    font-family: var(--font-body);
    width: 2.5rem; height: 2.5rem;
}
.lightbox-close:hover { color: var(--signal); }

/* ---- Contact Form ---- */
.contact-form {
    max-width: 500px; margin: 2rem auto 0;
    display: flex; flex-direction: column; gap: 0.75rem;
}
.contact-form input,
.contact-form textarea {
    width: 100%; padding: 0.65rem 0.9rem;
    font-family: var(--font-body); font-size: 0.875rem;
    background: var(--surface); color: var(--ink);
    border: 1px solid var(--hairline-strong);
    outline: none; transition: border-color 0.2s;
    box-sizing: border-box;
}
.contact-form input:focus,
.contact-form textarea:focus { border-color: var(--signal); }
.contact-form textarea { resize: vertical; min-height: 100px; }
.contact-form .btn { align-self: flex-start; }
.captcha-row {
    display: flex; align-items: center; gap: 0.5rem;
}
.captcha-question {
    flex: 0 0 auto;
    font-size: 0.825rem; color: var(--muted);
    white-space: nowrap;
}
.captcha-row .captcha-input {
    flex: 1 1 auto; width: auto; min-width: 80px;
}
.captcha-refresh {
    flex: 0 0 auto;
    background: var(--surface); border: 1px solid var(--hairline-strong);
    color: var(--muted); cursor: pointer;
    font-size: 1.1rem; line-height: 1;
    padding: 0.4rem 0.55rem; transition: color 0.2s, border-color 0.2s;
}
.captcha-refresh:hover { color: var(--signal); border-color: var(--signal); }
.contact-result {
    text-align: center; margin-top: 1rem;
    font-size: 0.875rem; color: var(--muted);
}
.contact-result.contact-ok { color: var(--signal); }
.contact-result.contact-err { color: var(--err); }

/* ---- Responsive ---- */
@media (max-width: 768px) {
    html { font-size: 100%; }
    .hero { padding: 5rem 1.25rem 3rem; }
    .hero-title { font-size: 2.2rem; }
    .section { padding: 3rem 1.25rem; }
    .section-title { font-size: 1.5rem; }
    .features-grid { grid-template-columns: 1fr; }
    .split { grid-template-columns: 1fr; gap: 1.5rem; }
    .split.reverse { direction: ltr; }
    .dual-images { grid-template-columns: 1fr; }
    .admin-grid { grid-template-columns: repeat(2, 1fr); }
    .nav-links { display: none; }
    .stats-bar { grid-template-columns: repeat(2, 1fr); }
    .tech-strip { gap: 1rem 2rem; }
    .lightbox-img { max-width: 92vw; }
}
@media (max-width: 480px) {
    .stats-bar { grid-template-columns: 1fr; }
    .admin-grid { grid-template-columns: 1fr; }
    .hero-title { font-size: 1.7rem; }
    .hero-desc { font-size: 0.85rem; }
    .btn { width: 100%; justify-content: center; }
}