/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --bg: #0f1117;
    --bg-card: #1a1d26;
    --bg-input: #252830;
    --border: #2e313a;
    --text: #e0e2e8;
    --text-muted: #8b8f9a;
    --accent: #4ecdc4;
    --accent-hover: #3db8b0;
    --accent-glow: rgba(78,205,196,0.15);
    --danger: #e74c3c;
    --danger-hover: #c0392b;
    --warning-bg: #332b00;
    --warning-border: #665500;
    --warning-text: #ffcc00;
    --success-bg: #0a2e1a;
    --success-border: #1a5c34;
    --success-text: #4ecdc4;
    --danger-bg: #2e0a0a;
    --danger-border: #5c1a1a;
    --danger-text: #e74c3c;
    --sidebar-width: 240px;
    --radius: 8px;
    --radius-lg: 12px;
    --shadow: 0 2px 12px rgba(0,0,0,0.3);
}

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

/* ===== SIDEBAR ===== */
.sidebar {
    position: fixed;
    top: 0; left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--bg-card);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    z-index: 100;
    overflow-y: auto;
}

.sidebar-header {
    padding: 24px 20px 8px;
    border-bottom: 1px solid var(--border);
}
.sidebar-header h2 {
    color: var(--accent);
    font-size: 1.3rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    margin-bottom: 2px;
}
.sidebar-subtitle {
    color: var(--text-muted);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}
.sidebar-user {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
}
.user-avatar {
    width: 36px; height: 36px;
    border-radius: 50%;
    background: var(--accent);
    color: var(--bg);
    display: flex; align-items: center; justify-content: center;
    font-weight: 700;
    font-size: 0.9rem;
}
.user-name {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text);
}
.sidebar-nav {
    list-style: none;
    padding: 12px 0;
    flex: 1;
}
.sidebar-nav li a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 20px;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 500;
    transition: all 0.2s;
    border-left: 3px solid transparent;
}
.sidebar-nav li a:hover {
    background: var(--accent-glow);
    color: var(--accent);
    border-left-color: var(--accent);
}
.sidebar-nav li a.active {
    background: var(--accent-glow);
    color: var(--accent);
    border-left-color: var(--accent);
    font-weight: 600;
}
.nav-icon { font-size: 0.9rem; }
.sidebar-footer {
    padding: 16px 20px;
    border-top: 1px solid var(--border);
}

/* ===== MAIN CONTENT ===== */
.main-content {
    margin-left: var(--sidebar-width);
    padding: 32px 40px;
    min-height: 100vh;
}

/* ===== AUTH WRAPPER ===== */
.auth-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 40px 20px;
}

/* ===== FLASH MESSAGES ===== */
.flash-container { margin-bottom: 24px; }
.alert {
    padding: 12px 20px;
    border-radius: var(--radius);
    font-size: 0.85rem;
    margin-bottom: 8px;
    border: 1px solid;
}
.alert-success { background: var(--success-bg); border-color: var(--success-border); color: var(--success-text); }
.alert-warning { background: var(--warning-bg); border-color: var(--warning-border); color: var(--warning-text); }
.alert-danger  { background: var(--danger-bg);  border-color: var(--danger-border);  color: var(--danger-text); }

/* ===== PAGE HEADER ===== */
.page-header {
    margin-bottom: 28px;
}
.page-header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 4px;
}
.page-header .subtitle {
    color: var(--text-muted);
    font-size: 0.85rem;
}
.farm-badge {
    display: inline-block;
    background: var(--accent-glow);
    color: var(--accent);
    padding: 4px 14px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-top: 6px;
}

/* ===== CARDS ===== */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 24px;
    box-shadow: var(--shadow);
}
.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
}
.card-header h2 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--accent);
    margin: 0;
}
.card-header .card-badge {
    background: var(--accent);
    color: var(--bg);
    padding: 2px 10px;
    border-radius: 12px;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
}

/* ===== TABLES - TRANSPOSED (fields as rows, years as columns) ===== */
.table-wrapper {
    overflow-x: auto;
    margin-bottom: 16px;
}
table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.82rem;
}
table th, table td {
    padding: 10px 14px;
    border-bottom: 1px solid var(--border);
    text-align: left;
    white-space: nowrap;
}
table th {
    background: var(--bg-input);
    color: var(--accent);
    font-weight: 600;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    position: sticky;
    left: 0;
    z-index: 1;
}
table td {
    color: var(--text);
}
table tbody tr:hover {
    background: rgba(78,205,196,0.04);
}
table .row-label {
    background: var(--bg-input);
    color: var(--text-muted);
    font-weight: 600;
    font-size: 0.78rem;
    min-width: 180px;
    position: sticky;
    left: 0;
    z-index: 1;
}
table .row-total {
    background: rgba(78,205,196,0.08);
    font-weight: 700;
    color: var(--accent);
}

/* ===== FORMS - TRANSPOSED (fields as rows) ===== */
.form-transposed {
    border-left: 1px solid var(--border);
}
.form-transposed td {
    padding: 6px 10px;
}
.form-transposed input[type="number"],
.form-transposed input[type="text"] {
    width: 100%;
    min-width: 80px;
    padding: 8px 10px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text);
    font-size: 0.82rem;
    transition: border-color 0.2s;
}
.form-transposed input:focus {
    border-color: var(--accent);
    outline: none;
    box-shadow: 0 0 0 2px var(--accent-glow);
}
.form-transposed .computed-field {
    background: rgba(78,205,196,0.1);
    border-color: var(--accent);
    font-weight: 700;
    color: var(--accent);
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-block;
    padding: 8px 18px;
    border: none;
    border-radius: 6px;
    font-size: 0.82rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.2s;
    text-align: center;
}
.btn-primary {
    background: var(--accent);
    color: var(--bg);
}
.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
}
.btn-danger {
    background: var(--danger);
    color: #fff;
    padding: 4px 10px;
    font-size: 0.75rem;
}
.btn-danger:hover {
    background: var(--danger-hover);
}
.btn-outline-danger {
    background: transparent;
    color: var(--danger);
    border: 1px solid var(--danger);
    padding: 6px 16px;
    font-size: 0.8rem;
    width: 100%;
}
.btn-outline-danger:hover {
    background: var(--danger);
    color: #fff;
}
.btn-sm {
    padding: 6px 14px;
    font-size: 0.78rem;
}
.btn-secondary {
    background: var(--bg-input);
    color: var(--text);
    border: 1px solid var(--border);
}
.btn-secondary:hover {
    border-color: var(--accent);
    color: var(--accent);
}

/* ===== INSTRUCTIONS ===== */
.instructions {
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px 20px;
    margin-bottom: 24px;
    font-size: 0.82rem;
    color: var(--text-muted);
    line-height: 1.7;
}
.instructions strong {
    color: var(--accent);
}

/* ===== CHART CONTAINER ===== */
.chart-container {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 24px;
}
.chart-container h3 {
    color: var(--accent);
    font-size: 1rem;
    margin-bottom: 16px;
}
.chart-container canvas {
    width: 100% !important;
    max-height: 350px;
}

/* ===== STAT CARDS (for resume page) ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}
.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 20px;
    text-align: center;
}
.stat-card .stat-value {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--accent);
    line-height: 1.2;
}
.stat-card .stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 4px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

/* ===== AUTH FORMS ===== */
.auth-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 40px;
    width: 100%;
    max-width: 420px;
    box-shadow: var(--shadow);
}
.auth-card h1 {
    color: var(--accent);
    font-size: 1.4rem;
    text-align: center;
    margin-bottom: 8px;
}
.auth-card .auth-subtitle {
    color: var(--text-muted);
    font-size: 0.85rem;
    text-align: center;
    margin-bottom: 28px;
}
.form-group {
    margin-bottom: 16px;
}
.form-group label {
    display: block;
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--text-muted);
    margin-bottom: 6px;
}
.form-group input {
    width: 100%;
    padding: 10px 14px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text);
    font-size: 0.88rem;
    transition: border-color 0.2s;
}
.form-group input:focus {
    border-color: var(--accent);
    outline: none;
    box-shadow: 0 0 0 2px var(--accent-glow);
}
.auth-card .btn-primary {
    width: 100%;
    padding: 12px;
    font-size: 0.9rem;
    margin-top: 8px;
}
.auth-card .auth-link {
    text-align: center;
    margin-top: 20px;
    font-size: 0.82rem;
    color: var(--text-muted);
}
.auth-card .auth-link a {
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
}
.auth-card .auth-link a:hover {
    text-decoration: underline;
}
.auth-brand {
    text-align: center;
    margin-bottom: 32px;
}
.auth-brand h1 {
    color: var(--accent);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 4px;
}
.auth-brand h2 {
    color: var(--accent);
    font-size: 1.6rem;
    font-weight: 700;
}
.auth-brand p, .auth-brand span {
    color: var(--text-muted);
    font-size: 0.85rem;
}
.auth-actions {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 24px;
}
.auth-switch {
    text-align: center;
    margin-top: 20px;
    font-size: 0.82rem;
    color: var(--text-muted);
}
.auth-switch a {
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
}
.auth-switch a:hover {
    text-decoration: underline;
}
.auth-footer {
    text-align: center;
    margin-top: 32px;
    font-size: 0.75rem;
    color: var(--text-muted);
}
.btn-block {
    display: block;
    width: 100%;
}
.btn-outline {
    display: inline-block;
    padding: 10px 20px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent);
    background: transparent;
    border: 1.5px solid var(--accent);
    border-radius: 6px;
    text-align: center;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s;
}
.btn-outline:hover {
    background: var(--accent);
    color: var(--bg);
}

/* ===== SECTION TABS ===== */
.section-tabs {
    display: flex;
    gap: 4px;
    margin-bottom: 24px;
    overflow-x: auto;
    border-bottom: 1px solid var(--border);
    padding-bottom: 0;
}
.section-tab {
    padding: 10px 18px;
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--text-muted);
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}
.section-tab:hover {
    color: var(--accent);
}
.section-tab.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

/* ===== DATA SECTION ===== */
.data-section {
    display: none;
}
.data-section.active {
    display: block;
}

/* ===== FARM LIST (admin) ===== */
.farm-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 12px;
    margin-bottom: 24px;
}
.farm-item {
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 14px 18px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.farm-item .farm-name {
    font-weight: 600;
    color: var(--text);
    font-size: 0.88rem;
}
.farm-item .farm-meta {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* ===== FOOTER ===== */
.app-footer {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.72rem;
    padding: 32px 0 16px;
    border-top: 1px solid var(--border);
    margin-top: 48px;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .sidebar { width: 200px; }
    :root { --sidebar-width: 200px; }
    .main-content { padding: 20px; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
    .sidebar { display: none; }
    .main-content { margin-left: 0; }
}