/* TrailShare Frontend — modern, clean, secure */
:root {
    --bg: #0a0908;
    --surface: #1a1816;
    --surface-light: #252321;
    --text: #f5f3ef;
    --text-dim: #a09b91;
    --accent: #b8975a;
    --accent-dim: #8a6e3f;
    --danger: #c75450;
    --success: #6b9e5a;
    --border: #3a3735;
    --radius: 12px;
}

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

body {
    background: var(--bg);
    color: var(--text);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: 15px;
    line-height: 1.6;
}

#app { min-height: 100vh; }

/* Auth screen */
.auth-screen {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
}

.auth-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 40px;
    max-width: 480px;
    width: 100%;
}

.auth-logo {
    font-size: 24px;
    font-weight: 700;
    color: var(--accent);
    text-align: center;
    margin-bottom: 24px;
    cursor: pointer;
    letter-spacing: -0.5px;
    transition: opacity 0.15s;
}

.auth-logo:hover {
    opacity: 0.7;
}

.auth-back-link {
    display: block;
    text-align: center;
    margin-top: 24px;
    font-size: 13px;
    color: var(--text-dim);
    text-decoration: none;
    transition: color 0.15s;
}

.auth-back-link:hover {
    color: var(--accent);
}

.auth-card h1 {
    font-family: 'Cormorant Garamond', serif;
    font-size: 32px;
    font-weight: 400;
    margin-bottom: 8px;
    color: var(--accent);
}

.auth-card p {
    color: var(--text-dim);
    margin-bottom: 24px;
}

.auth-card input, .auth-card textarea {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    font-size: 14px;
    margin-bottom: 12px;
}

.auth-card button {
    width: 100%;
    padding: 14px;
    background: var(--accent);
    border: none;
    border-radius: 8px;
    color: var(--bg);
    font-weight: 600;
    cursor: pointer;
    font-size: 15px;
}

.auth-card button:hover { background: var(--accent-dim); }
.auth-card button:disabled { opacity: 0.5; cursor: not-allowed; }

/* Layout */
.layout {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 240px;
    background: var(--surface);
    border-right: 1px solid var(--border);
    padding: 20px 0;
    flex-shrink: 0;
}

.sidebar-brand {
    padding: 0 24px 20px;
    font-family: 'Cormorant Garamond', serif;
    font-size: 22px;
    color: var(--accent);
    letter-spacing: 0.02em;
}

.sidebar nav a {
    display: block;
    padding: 10px 24px;
    color: var(--text-dim);
    text-decoration: none;
    cursor: pointer;
    transition: 0.2s;
    font-size: 15px;
    letter-spacing: 0.01em;
}

.sidebar nav a:hover {
    color: var(--text);
    background: var(--surface-light);
}

.sidebar nav a.active {
    color: var(--text);
    background: var(--surface-light);
    border-left: 3px solid var(--accent);
    font-weight: 500;
}

.sidebar nav .nav-divider {
    height: 1px;
    background: var(--border);
    margin: 12px 24px;
}

.sidebar-footer {
    padding: 16px 24px;
    margin-top: auto;
    border-top: 1px solid var(--border);
    font-size: 13px;
    color: var(--text-dim);
}

.sidebar-footer .wallet-addr {
    color: var(--accent);
    font-family: monospace;
    font-size: 12px;
    word-break: break-all;
}

.main {
    flex: 1;
    padding: 40px;
    overflow-y: auto;
}

.main h2 {
    font-family: 'Cormorant Garamond', serif;
    font-size: 28px;
    font-weight: 400;
    margin-bottom: 24px;
    color: var(--accent);
}

/* Cards */
.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    margin-bottom: 20px;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.stat-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
}

.stat-card .label {
    color: var(--text-dim);
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.stat-card .value {
    font-family: 'Cormorant Garamond', serif;
    font-size: 36px;
    color: var(--accent);
    margin-top: 8px;
}

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

th { color: var(--text-dim); font-size: 13px; text-transform: uppercase; letter-spacing: 1px; }
td { font-size: 14px; }

/* Chat */
.chat-container {
    display: flex;
    flex-direction: column;
    height: calc(100vh - 120px);
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 20px 0;
}

.chat-msg {
    margin-bottom: 16px;
    max-width: 70%;
}

.chat-msg.user { margin-left: auto; }
.chat-msg.assistant { margin-right: auto; }

.chat-msg .bubble {
    padding: 12px 16px;
    border-radius: 12px;
    font-size: 14px;
    line-height: 1.6;
}

.chat-msg.user .bubble {
    background: var(--accent);
    color: var(--bg);
}

.chat-msg.assistant .bubble {
    background: var(--surface-light);
    color: var(--text);
}

.chat-input {
    display: flex;
    gap: 12px;
    padding: 16px 0;
    border-top: 1px solid var(--border);
}

.chat-input input {
    flex: 1;
    padding: 12px 16px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    font-size: 14px;
}

.chat-input button {
    padding: 12px 24px;
    background: var(--accent);
    border: none;
    border-radius: 8px;
    color: var(--bg);
    font-weight: 600;
    cursor: pointer;
}

/* Status badges */
.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
}

.badge.paid { background: var(--success); color: var(--bg); }
.badge.open { background: var(--accent); color: var(--bg); }
.badge.draft { background: var(--surface-light); color: var(--text-dim); }
.badge.void { background: var(--danger); color: var(--text); }

/* Responsive */
@media (max-width: 768px) {
    .layout { flex-direction: column; }
    .sidebar { width: 100%; }
    .main { padding: 20px; }
}

/* ============================================================
   Landing page
   ============================================================ */
.landing {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.landing-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 40px;
}

.nav-actions {
    display: flex;
    gap: 12px;
    align-items: center;
}

.landing-logo {
    font-size: 22px;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: -0.5px;
}

.landing-btn-primary {
    padding: 12px 28px;
    background: var(--accent);
    color: var(--bg);
    border: none;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: opacity 0.2s;
}

.landing-btn-primary:hover { opacity: 0.9; }

.landing-btn-secondary {
    padding: 12px 28px;
    background: transparent;
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: border-color 0.2s;
}

.landing-btn-secondary:hover { border-color: var(--accent); }

.hero {
    text-align: center;
    padding: 80px 40px 60px;
    max-width: 700px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 48px;
    font-weight: 800;
    letter-spacing: -1px;
    margin-bottom: 20px;
    line-height: 1.1;
}

.hero-sub {
    font-size: 18px;
    color: var(--text-dim);
    line-height: 1.6;
    margin-bottom: 32px;
}

.hero-cta {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}

.features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    max-width: 900px;
    margin: 0 auto;
    padding: 60px 40px;
}

.feature {
    text-align: center;
}

.feature-icon {
    font-size: 40px;
    margin-bottom: 16px;
}

.feature h3 {
    font-size: 18px;
    margin-bottom: 8px;
}

.feature p {
    font-size: 14px;
    color: var(--text-dim);
    line-height: 1.5;
}

.how-it-works {
    text-align: center;
    padding: 60px 40px;
    max-width: 700px;
    margin: 0 auto;
}

.how-it-works h2 {
    font-size: 32px;
    margin-bottom: 32px;
}

.steps {
    display: flex;
    justify-content: center;
    gap: 32px;
    flex-wrap: wrap;
}

.step {
    text-align: center;
    max-width: 180px;
}

.step-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--accent);
    color: var(--bg);
    border-radius: 50%;
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 12px;
}

.step p {
    font-size: 14px;
    color: var(--text-dim);
    line-height: 1.5;
}

.cta-final {
    text-align: center;
    padding: 80px 40px;
}

.cta-final h2 {
    font-size: 32px;
    margin-bottom: 24px;
}

.cta-note {
    margin-top: 16px;
    font-size: 14px;
    color: var(--text-dim);
}

.landing-footer {
    text-align: center;
    padding: 40px;
    color: var(--text-dim);
    font-size: 13px;
    border-top: 1px solid var(--border);
}

/* Auth screen */
.auth-screen {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
}

.auth-card {
    background: var(--surface);
    padding: 40px;
    border-radius: 16px;
    max-width: 420px;
    width: 100%;
    border: 1px solid var(--border);
}

.auth-card h1 {
    font-size: 28px;
    margin-bottom: 8px;
}

.auth-card p {
    color: var(--text-dim);
    font-size: 14px;
    line-height: 1.5;
    margin-bottom: 20px;
}

.auth-card textarea,
.auth-card input {
    width: 100%;
    padding: 12px;
    margin-bottom: 12px;
    background: var(--surface-light);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    font-size: 14px;
    box-sizing: border-box;
}

.auth-card button {
    width: 100%;
    padding: 14px;
    background: var(--accent);
    color: var(--bg);
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
}

.auth-card button:hover { opacity: 0.9; }

@media (max-width: 768px) {
    .features { grid-template-columns: 1fr; }
    .hero h1 { font-size: 36px; }
    .landing-nav { padding: 16px 20px; }
}