/* Gain - AI Time Savings Tracker */

:root {
    --primary: #10b981;
    --primary-dark: #059669;
    --secondary: #6366f1;
    --bg: #f8fafc;
    --bg-card: #ffffff;
    --bg-input: #f1f5f9;
    --text: #1e293b;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --success: #16a34a;
    --warning: #d97706;
    --error: #dc2626;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

/* Dark theme option - add class="dark" to body or data-theme="dark" to html */
body.dark,
html[data-theme="dark"] body {
    --bg: #0f172a;
    --bg-card: #1e293b;
    --bg-input: #334155;
    --text: #f1f5f9;
    --text-muted: #94a3b8;
    --border: #334155;
    --success: #22c55e;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
}

/* Login Page */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #ecfdf5 0%, #d1fae5 100%);
}

body.dark.login-page,
html[data-theme="dark"] .login-page {
    background: linear-gradient(135deg, #0f172a 0%, #1a1a2e 100%);
}

.login-container {
    width: 100%;
    max-width: 400px;
    padding: 20px;
}

.login-box {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 40px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border);
}

.logo {
    text-align: center;
    margin-bottom: 30px;
}

.logo h1 {
    font-size: 2.5rem;
    margin-bottom: 8px;
}

.login-logo {
    max-width: 180px;
    height: auto;
    margin-bottom: 8px;
}

.logo p {
    color: var(--text-muted);
}

.error-message {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--error);
    color: var(--error);
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 20px;
    text-align: center;
}

.login-footer {
    text-align: center;
    margin-top: 20px;
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* Header */
header {
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    padding: 16px 24px;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow);
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 24px;
    flex-wrap: wrap;
}

.logo-link {
    display: flex;
    align-items: center;
}

.header-logo {
    height: 36px;
    width: auto;
}

nav {
    display: flex;
    gap: 8px;
    flex: 1;
}

.nav-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    padding: 8px 16px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.2s;
}

.nav-btn:hover {
    background: var(--bg-input);
    color: var(--text);
}

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

.user-info {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-muted);
}

.theme-toggle {
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 6px 10px;
    font-size: 1.1rem;
    cursor: pointer;
    transition: all 0.2s;
}

.theme-toggle:hover {
    background: var(--border);
}

.login-theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
}

/* Main */
main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 24px;
}

/* Stats Banner */
.stats-banner {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.stat {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 20px;
    text-align: center;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}

.stat-value {
    display: block;
    font-size: 1.75rem;
    font-weight: bold;
    color: var(--primary);
}

.stat-label {
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* Cards */
.card {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 24px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}

.card h2 {
    margin-bottom: 20px;
    font-size: 1.25rem;
}

/* Tabs */
.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* Forms */
.form-group {
    margin-bottom: 16px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

@media (max-width: 600px) {
    .form-row {
        grid-template-columns: 1fr;
    }
}

label {
    display: block;
    margin-bottom: 6px;
    color: var(--text-muted);
    font-size: 0.875rem;
}

input, textarea, select {
    width: 100%;
    padding: 12px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    font-size: 1rem;
    transition: border-color 0.2s;
}

input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: var(--primary);
}

textarea {
    resize: vertical;
    min-height: 80px;
}

/* Unit buttons */
.unit-buttons {
    display: flex;
    gap: 6px;
    margin-top: 8px;
}

.unit-btn {
    background: var(--bg-input);
    border: 1px solid var(--border);
    color: var(--text-muted);
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s;
    flex: 1;
}

.unit-btn:hover {
    border-color: var(--primary);
    color: var(--text);
}

.unit-btn.selected {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

/* AI tool suggestions */
.ai-tool-suggestions {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: 8px;
}

.tool-btn {
    background: var(--bg-input);
    border: 1px solid var(--border);
    color: var(--text-muted);
    padding: 4px 10px;
    border-radius: 16px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s;
}

.tool-btn:hover {
    border-color: var(--primary);
    color: var(--text);
}

.tool-btn.selected {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

/* Category buttons */
.category-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.category-btn {
    background: var(--bg-input);
    border: 1px solid var(--border);
    color: var(--text-muted);
    padding: 8px 14px;
    border-radius: 8px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s;
}

.category-btn:hover {
    border-color: var(--primary);
    color: var(--text);
}

.category-btn.selected {
    background: var(--secondary);
    border-color: var(--secondary);
    color: white;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

.checkbox-group input[type="checkbox"] {
    width: auto;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
}

.btn-primary {
    background: var(--primary);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-dark);
}

.btn-block {
    width: 100%;
}

.btn-small {
    padding: 6px 12px;
    font-size: 0.875rem;
}

/* Time Saved Preview */
.time-saved-preview {
    background: var(--bg-input);
    border-radius: 8px;
    padding: 16px;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border: 1px solid var(--border);
}

.time-saved-preview .value {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--text-muted);
}

.time-saved-preview .value.positive {
    color: var(--success);
}

/* Gains List */
.gains-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.gain-item {
    display: flex;
    align-items: center;
    gap: 16px;
    background: var(--bg-input);
    border-radius: 12px;
    padding: 16px;
    border: 1px solid var(--border);
}

.gain-main {
    flex: 1;
}

.gain-description {
    font-weight: 500;
    margin-bottom: 8px;
}

.gain-meta {
    display: flex;
    gap: 12px;
    font-size: 0.875rem;
    color: var(--text-muted);
}

.gain-meta .category {
    background: var(--secondary);
    color: white;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.75rem;
}

.gain-times {
    text-align: right;
}

.gain-times .time-saved {
    font-weight: bold;
    color: var(--success);
}

.gain-times .time-details {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.share-btn {
    background: transparent;
    border: none;
    font-size: 1.25rem;
    cursor: pointer;
    opacity: 0.5;
    transition: opacity 0.2s;
}

.share-btn:hover, .share-btn.shared {
    opacity: 1;
}

/* Leaderboard */
.period-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
}

.period-btn {
    background: var(--bg-input);
    border: 1px solid var(--border);
    color: var(--text-muted);
    padding: 8px 16px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
}

.period-btn:hover {
    border-color: var(--primary);
}

.period-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

.leaderboard-table {
    width: 100%;
    border-collapse: collapse;
}

.leaderboard-table th,
.leaderboard-table td {
    padding: 12px;
    text-align: left;
}

.leaderboard-table th {
    color: var(--text-muted);
    font-weight: 500;
    border-bottom: 1px solid var(--border);
}

.leaderboard-table tr:hover {
    background: var(--bg-input);
}

.leaderboard-table .rank {
    font-size: 1.25rem;
    width: 50px;
}

.leaderboard-table .name {
    display: flex;
    align-items: center;
    gap: 12px;
}

.avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
}

.leaderboard-table .saved {
    color: var(--success);
    font-weight: 500;
}

.leaderboard-table tr.top-1 td {
    background: rgba(255, 215, 0, 0.1);
}

.leaderboard-table tr.top-2 td {
    background: rgba(192, 192, 192, 0.1);
}

.leaderboard-table tr.top-3 td {
    background: rgba(205, 127, 50, 0.1);
}

/* Shared/Inspiration */
.category-filter {
    margin-bottom: 20px;
}

.category-filter select {
    max-width: 200px;
}

.shared-gains {
    display: grid;
    gap: 16px;
}

.shared-item {
    background: var(--bg-input);
    border-radius: 12px;
    padding: 16px;
    border: 1px solid var(--border);
}

.shared-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
}

.shared-header .author {
    font-weight: 500;
}

.shared-header .category {
    background: var(--secondary);
    color: white;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.75rem;
}

.shared-description {
    color: var(--text-muted);
    margin-bottom: 12px;
}

.shared-footer {
    display: flex;
    gap: 16px;
    font-size: 0.875rem;
    color: var(--text-muted);
}

.shared-footer .saved {
    color: var(--success);
}

/* Utility */
.loading, .empty, .error {
    text-align: center;
    padding: 40px;
    color: var(--text-muted);
}

.error {
    color: var(--error);
}

/* Responsive */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 16px;
    }
    
    nav {
        width: 100%;
        justify-content: center;
    }
    
    .user-info {
        width: 100%;
        justify-content: center;
    }
}