/* ========================================
   Tahsildar.org V2 - Light Premium Design System
   SMMM Tahsilat Yönetim Sistemi
   Beyaz zemin, turkuaz butonlar, premium his
   ======================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

/* ---- CSS Custom Properties ---- */
:root {
    --bg-primary: #f5f7fa;
    --bg-secondary: #ffffff;
    --bg-tertiary: #edf0f5;
    --bg-page: #f0f2f7;
    --turquoise: #0ea5a0;
    --turquoise-light: #14b8b3;
    --turquoise-dark: #0d8f8b;
    --turquoise-glow: rgba(14, 165, 160, 0.2);
    --turquoise-subtle: rgba(14, 165, 160, 0.08);
    --turquoise-gradient: linear-gradient(135deg, #0ea5a0, #0bb5b0);
    --cyan: #06b6d4;
    --success: #22c55e;
    --success-bg: rgba(34, 197, 94, 0.08);
    --warning: #f59e0b;
    --warning-bg: rgba(245, 158, 11, 0.08);
    --danger: #ef4444;
    --danger-bg: rgba(239, 68, 68, 0.08);
    --info: #3b82f6;
    --info-bg: rgba(59, 130, 246, 0.08);
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --border: #e2e8f0;
    --border-hover: #cbd5e1;
    --card-bg: #ffffff;
    --card-shadow: 0 1px 3px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.06);
    --card-shadow-hover: 0 10px 25px rgba(0,0,0,0.08);
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 10px 40px rgba(0,0,0,0.12);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

/* ---- Reset ---- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
    font-family: var(--font);
    background: var(--bg-page);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--turquoise); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--turquoise-dark); }

/* ---- Glass Card (now solid white with subtle shadow) ---- */
.glass-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px;
    transition: var(--transition);
    box-shadow: var(--card-shadow);
}
.glass-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-2px);
    box-shadow: var(--card-shadow-hover);
}

.glass-card-static {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--card-shadow);
}

/* ---- Buttons ---- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-sm);
    font-family: var(--font);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
    text-decoration: none;
    line-height: 1.4;
}

.btn-primary {
    background: var(--turquoise-gradient);
    color: #fff;
    font-weight: 600;
    box-shadow: 0 2px 8px var(--turquoise-glow);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--turquoise-glow);
    background: linear-gradient(135deg, var(--turquoise-dark), var(--turquoise));
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border);
}
.btn-secondary:hover {
    background: var(--bg-primary);
    border-color: var(--turquoise);
    color: var(--turquoise);
}

.btn-success {
    background: linear-gradient(135deg, #22c55e, #16a34a);
    color: #fff;
    font-weight: 600;
}
.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(34, 197, 94, 0.25);
}

.btn-danger {
    background: linear-gradient(135deg, #ef4444, #dc2626);
    color: #fff;
    font-weight: 600;
}
.btn-danger:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(239, 68, 68, 0.25);
}

.btn-warning {
    background: linear-gradient(135deg, #f59e0b, #d97706);
    color: #fff;
    font-weight: 600;
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    padding: 8px 12px;
}
.btn-ghost:hover {
    color: var(--turquoise);
    background: var(--turquoise-subtle);
    border-radius: var(--radius-sm);
}

.btn-sm { padding: 6px 12px; font-size: 12px; }
.btn-lg { padding: 14px 28px; font-size: 16px; }
.btn-block { width: 100%; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none !important; }

/* ---- Form Elements ---- */
.form-group { margin-bottom: 20px; }

.form-label {
    display: block;
    margin-bottom: 6px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-input, .form-select, .form-textarea {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font);
    font-size: 14px;
    transition: var(--transition);
    outline: none;
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
    border-color: var(--turquoise);
    box-shadow: 0 0 0 3px var(--turquoise-subtle);
    background: #fff;
}

.form-input::placeholder { color: var(--text-muted); }

.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%230ea5a0' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

.form-select option { background: #fff; color: var(--text-primary); }
.form-textarea { resize: vertical; min-height: 80px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

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

.sidebar {
    width: 260px;
    background: #ffffff;
    border-right: 1px solid var(--border);
    padding: 24px 0;
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    z-index: 100;
    display: flex;
    flex-direction: column;
    transition: var(--transition);
    box-shadow: 2px 0 8px rgba(0,0,0,0.03);
}

.sidebar-header {
    padding: 0 20px 24px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 16px;
}

.sidebar-logo { display: flex; align-items: center; gap: 12px; }

.sidebar-logo-icon {
    width: 40px;
    height: 40px;
    background: var(--turquoise-gradient);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: #fff;
    font-weight: 800;
}

.sidebar-logo-text { font-size: 18px; font-weight: 700; color: var(--text-primary); }
.sidebar-logo-text span { color: var(--turquoise); }

.sidebar-nav { flex: 1; padding: 0 12px; overflow-y: auto; }
.nav-section { margin-bottom: 24px; }

.nav-section-title {
    font-size: 11px;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1.2px;
    padding: 0 12px;
    margin-bottom: 8px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    margin-bottom: 2px;
}
.nav-item:hover { background: var(--bg-primary); color: var(--text-primary); }
.nav-item.active { background: var(--turquoise-subtle); color: var(--turquoise); font-weight: 600; }
.nav-item-icon { font-size: 18px; width: 24px; text-align: center; }

.nav-item-badge {
    margin-left: auto;
    background: var(--danger);
    color: #fff;
    font-size: 11px;
    font-weight: 600;
    padding: 2px 7px;
    border-radius: 10px;
    min-width: 20px;
    text-align: center;
}

.sidebar-footer { padding: 16px 20px; border-top: 1px solid var(--border); }
.sidebar-user { display: flex; align-items: center; gap: 12px; }

.sidebar-user-avatar {
    width: 36px;
    height: 36px;
    background: var(--turquoise-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: #fff;
    font-size: 14px;
}

.sidebar-user-info { flex: 1; overflow: hidden; }
.sidebar-user-name { font-size: 14px; font-weight: 600; color: var(--text-primary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.sidebar-user-role { font-size: 12px; color: var(--text-muted); }

/* Main Content */
.main-content { flex: 1; margin-left: 260px; padding: 24px 32px; min-height: 100vh; }

.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 32px;
    flex-wrap: wrap;
    gap: 16px;
}

.page-title { font-size: 28px; font-weight: 800; color: var(--text-primary); }
.page-subtitle { font-size: 14px; color: var(--text-secondary); margin-top: 4px; }

/* ---- Stats Grid ---- */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 20px; margin-bottom: 32px; }

.stat-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    box-shadow: var(--card-shadow);
}

.stat-card::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: var(--turquoise-gradient);
    opacity: 0;
    transition: var(--transition);
}

.stat-card:hover { transform: translateY(-4px); box-shadow: var(--card-shadow-hover); }
.stat-card:hover::after { opacity: 1; }
.stat-icon { font-size: 32px; margin-bottom: 12px; }
.stat-value { font-size: 32px; font-weight: 800; color: var(--text-primary); line-height: 1; margin-bottom: 4px; }
.stat-label { font-size: 13px; color: var(--text-secondary); font-weight: 500; }

.stat-change {
    display: inline-flex; align-items: center; gap: 4px;
    font-size: 12px; font-weight: 600; margin-top: 8px;
    padding: 2px 8px; border-radius: 4px;
}
.stat-change.up { color: var(--success); background: var(--success-bg); }
.stat-change.down { color: var(--danger); background: var(--danger-bg); }

/* ---- Data Table ---- */
.table-container {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--card-shadow);
}

.table-header {
    display: flex; align-items: center; justify-content: space-between;
    padding: 20px 24px; border-bottom: 1px solid var(--border);
    flex-wrap: wrap; gap: 12px;
}

.table-title { font-size: 18px; font-weight: 600; }
.table-actions { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.search-box { position: relative; }

.search-box input {
    padding: 8px 12px 8px 36px;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font);
    font-size: 13px;
    width: 220px;
    transition: var(--transition);
    outline: none;
}
.search-box input:focus { border-color: var(--turquoise); width: 280px; }
.search-box::before { content: '🔍'; position: absolute; left: 10px; top: 50%; transform: translateY(-50%); font-size: 14px; }

.data-table { width: 100%; border-collapse: collapse; }
.data-table th {
    padding: 14px 24px; text-align: left;
    font-size: 12px; font-weight: 700;
    color: var(--text-muted); text-transform: uppercase;
    letter-spacing: 0.5px; border-bottom: 1px solid var(--border);
    background: var(--bg-primary); white-space: nowrap;
}
.data-table td {
    padding: 14px 24px; font-size: 14px;
    border-bottom: 1px solid var(--border); vertical-align: middle;
}
.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: var(--bg-primary); }

/* ---- Badges ---- */
.badge {
    display: inline-flex; align-items: center; gap: 4px;
    padding: 4px 10px; border-radius: 20px;
    font-size: 12px; font-weight: 600; white-space: nowrap;
}
.badge-success { background: var(--success-bg); color: var(--success); border: 1px solid rgba(34,197,94,0.15); }
.badge-warning { background: var(--warning-bg); color: var(--warning); border: 1px solid rgba(245,158,11,0.15); }
.badge-danger { background: var(--danger-bg); color: var(--danger); border: 1px solid rgba(239,68,68,0.15); }
.badge-info { background: var(--info-bg); color: var(--info); border: 1px solid rgba(59,130,246,0.15); }
.badge-turquoise { background: var(--turquoise-subtle); color: var(--turquoise); border: 1px solid rgba(14,165,160,0.15); }

/* ---- Modal ---- */
.modal-overlay {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(15, 23, 42, 0.5);
    backdrop-filter: blur(4px);
    z-index: 1000; display: flex; align-items: center; justify-content: center;
    opacity: 0; visibility: hidden; transition: var(--transition);
}
.modal-overlay.active { opacity: 1; visibility: visible; }

.modal {
    background: #ffffff;
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    width: 90%; max-width: 560px; max-height: 90vh; overflow-y: auto;
    transform: scale(0.9) translateY(20px);
    transition: var(--transition);
    box-shadow: var(--shadow-lg);
}
.modal-overlay.active .modal { transform: scale(1) translateY(0); }

.modal-header {
    display: flex; align-items: center; justify-content: space-between;
    padding: 24px 24px 16px; border-bottom: 1px solid var(--border);
}
.modal-title { font-size: 20px; font-weight: 700; }

.modal-close {
    width: 32px; height: 32px; display: flex; align-items: center; justify-content: center;
    border: none; background: var(--bg-primary); color: var(--text-secondary);
    border-radius: 50%; cursor: pointer; transition: var(--transition); font-size: 18px;
}
.modal-close:hover { background: var(--danger-bg); color: var(--danger); }
.modal-body { padding: 24px; }
.modal-footer { display: flex; align-items: center; justify-content: flex-end; gap: 12px; padding: 16px 24px 24px; }

/* ---- Toast Notifications ---- */
.toast-container {
    position: fixed; top: 24px; right: 24px; z-index: 2000;
    display: flex; flex-direction: column; gap: 12px;
}

.toast {
    background: #ffffff;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 16px 20px;
    display: flex; align-items: center; gap: 12px;
    min-width: 320px; max-width: 420px;
    box-shadow: var(--shadow-lg);
    animation: slideInRight 0.3s ease;
}
.toast.toast-success { border-left: 3px solid var(--success); }
.toast.toast-error { border-left: 3px solid var(--danger); }
.toast.toast-warning { border-left: 3px solid var(--warning); }
.toast.toast-info { border-left: 3px solid var(--turquoise); }
.toast-icon { font-size: 20px; }
.toast-message { flex: 1; font-size: 14px; color: var(--text-primary); }
.toast-close { background: none; border: none; color: var(--text-muted); cursor: pointer; font-size: 16px; padding: 4px; }

@keyframes slideInRight { from { transform: translateX(100%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }
@keyframes slideOutRight { from { transform: translateX(0); opacity: 1; } to { transform: translateX(100%); opacity: 0; } }

/* ---- Login Page ---- */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: linear-gradient(135deg, #f0fdf8 0%, #f0f9ff 50%, #faf5ff 100%);
    position: relative;
}

.login-bg-orbs {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    pointer-events: none; overflow: hidden; z-index: 0;
}

.login-bg-orbs .orb {
    position: absolute; border-radius: 50%;
    filter: blur(80px); opacity: 0.6;
    animation: float 20s infinite ease-in-out;
}
.login-bg-orbs .orb:nth-child(1) { width: 400px; height: 400px; background: radial-gradient(circle, rgba(14,165,160,0.12), transparent); top: -10%; left: -5%; animation-duration: 25s; }
.login-bg-orbs .orb:nth-child(2) { width: 300px; height: 300px; background: radial-gradient(circle, rgba(6,182,212,0.1), transparent); bottom: -10%; right: -5%; animation-duration: 30s; animation-delay: -5s; }
.login-bg-orbs .orb:nth-child(3) { width: 200px; height: 200px; background: radial-gradient(circle, rgba(14,165,160,0.08), transparent); top: 50%; left: 50%; animation-duration: 20s; animation-delay: -10s; }

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(30px, -30px) scale(1.05); }
    50% { transform: translate(-20px, 20px) scale(0.95); }
    75% { transform: translate(15px, 15px) scale(1.02); }
}

.login-card {
    background: #ffffff;
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 48px;
    width: 100%; max-width: 420px;
    position: relative; z-index: 1;
    box-shadow: 0 20px 60px rgba(0,0,0,0.08);
}

.login-logo { text-align: center; margin-bottom: 32px; }

.login-logo-icon {
    width: 64px; height: 64px;
    background: var(--turquoise-gradient);
    border-radius: var(--radius-md);
    display: inline-flex; align-items: center; justify-content: center;
    font-size: 32px; color: #fff; font-weight: 800; margin-bottom: 16px;
    box-shadow: 0 8px 32px var(--turquoise-glow);
}

.login-title { font-size: 28px; font-weight: 800; margin-bottom: 4px; color: var(--text-primary); }
.login-title span { color: var(--turquoise); }
.login-subtitle { font-size: 14px; color: var(--text-secondary); }
.login-form .form-group { margin-bottom: 24px; }
.login-form .btn-primary { margin-top: 8px; padding: 14px; font-size: 16px; }
.login-footer { text-align: center; margin-top: 24px; font-size: 13px; color: var(--text-muted); }

/* ---- Filter Bar ---- */
.filter-bar { display: flex; align-items: center; gap: 12px; padding: 16px 0; flex-wrap: wrap; }

.filter-chip {
    padding: 6px 14px; border-radius: 20px;
    background: #fff; border: 1px solid var(--border);
    color: var(--text-secondary); font-size: 13px; font-weight: 500;
    cursor: pointer; transition: var(--transition);
}
.filter-chip:hover, .filter-chip.active {
    background: var(--turquoise-subtle); border-color: var(--turquoise); color: var(--turquoise);
}

/* ---- Empty State ---- */
.empty-state { text-align: center; padding: 60px 20px; }
.empty-state-icon { font-size: 64px; margin-bottom: 16px; opacity: 0.5; }
.empty-state-title { font-size: 20px; font-weight: 600; color: var(--text-secondary); margin-bottom: 8px; }
.empty-state-text { font-size: 14px; color: var(--text-muted); max-width: 300px; margin: 0 auto; }

/* ---- Loading Spinner ---- */
.spinner {
    width: 40px; height: 40px;
    border: 3px solid var(--border);
    border-top-color: var(--turquoise);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 40px auto;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---- Scrollbar ---- */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ---- Money Display ---- */
.money { font-weight: 700; font-variant-numeric: tabular-nums; }
.money-positive { color: var(--success); }
.money-negative { color: var(--danger); }
.money-pending { color: var(--warning); }

/* ---- Tab Navigation ---- */
.tab-nav {
    display: flex; gap: 4px; padding: 4px;
    background: var(--bg-primary); border-radius: var(--radius-md);
    border: 1px solid var(--border); margin-bottom: 24px;
}
.tab-item {
    flex: 1; padding: 10px 16px; text-align: center;
    border-radius: var(--radius-sm); font-size: 14px; font-weight: 500;
    color: var(--text-secondary); cursor: pointer; transition: var(--transition);
}
.tab-item:hover { color: var(--text-primary); }
.tab-item.active { background: #fff; color: var(--turquoise); font-weight: 600; box-shadow: var(--shadow-sm); }
.tab-content { display: none; }
.tab-content.active { display: block; }

/* ---- Notification ---- */
.notification-bell { position: relative; cursor: pointer; font-size: 20px; color: var(--text-secondary); transition: var(--transition); padding: 8px; }
.notification-bell:hover { color: var(--turquoise); }
.notification-bell .count {
    position: absolute; top: 2px; right: 2px;
    background: var(--danger); color: #fff; font-size: 10px; font-weight: 700;
    width: 18px; height: 18px; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
}

/* ---- Landing Page ---- */
.landing-nav {
    position: fixed; top: 0; left: 0; right: 0;
    background: rgba(255,255,255,0.9);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
    padding: 0 40px;
    transition: var(--transition);
}
.landing-nav-inner {
    max-width: 1200px; margin: 0 auto;
    display: flex; align-items: center; justify-content: space-between;
    height: 72px;
}
.landing-nav-logo { display: flex; align-items: center; gap: 10px; font-size: 22px; font-weight: 800; color: var(--text-primary); }
.landing-nav-logo span { color: var(--turquoise); }
.landing-nav-logo-icon {
    width: 36px; height: 36px; background: var(--turquoise-gradient);
    border-radius: 8px; display: flex; align-items: center; justify-content: center;
    color: #fff; font-size: 18px; font-weight: 800;
}
.landing-nav-links { display: flex; align-items: center; gap: 32px; }
.landing-nav-links a { color: var(--text-secondary); font-weight: 500; font-size: 15px; }
.landing-nav-links a:hover { color: var(--turquoise); }
.landing-nav-actions { display: flex; gap: 12px; }

/* Hero */
.hero {
    padding: 140px 40px 100px;
    text-align: center;
    background: linear-gradient(180deg, #f0fdf8 0%, #ffffff 100%);
    position: relative;
    overflow: hidden;
}
.hero::before {
    content: '';
    position: absolute;
    top: 50%; left: 50%;
    width: 600px; height: 600px;
    background: radial-gradient(circle, rgba(14,165,160,0.06), transparent 70%);
    transform: translate(-50%, -50%);
    pointer-events: none;
}
.hero-inner { max-width: 800px; margin: 0 auto; position: relative; z-index: 1; }
.hero-badge {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 6px 16px; border-radius: 20px;
    background: var(--turquoise-subtle); color: var(--turquoise);
    font-size: 13px; font-weight: 600; margin-bottom: 24px;
    border: 1px solid rgba(14,165,160,0.15);
}
.hero h1 { font-size: 52px; font-weight: 900; line-height: 1.1; margin-bottom: 20px; color: var(--text-primary); }
.hero h1 span { color: var(--turquoise); }
.hero p { font-size: 18px; color: var(--text-secondary); max-width: 600px; margin: 0 auto 36px; line-height: 1.7; }
.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.hero-actions .btn { padding: 16px 36px; font-size: 16px; border-radius: var(--radius-md); }

/* Features */
.features-section { padding: 100px 40px; background: #fff; }
.section-inner { max-width: 1200px; margin: 0 auto; }
.section-header { text-align: center; margin-bottom: 60px; }
.section-header h2 { font-size: 36px; font-weight: 800; margin-bottom: 12px; }
.section-header p { font-size: 16px; color: var(--text-secondary); max-width: 500px; margin: 0 auto; }

.features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 24px; }
.feature-card {
    background: var(--bg-primary); border: 1px solid var(--border);
    border-radius: var(--radius-lg); padding: 32px;
    transition: var(--transition);
}
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--card-shadow-hover); border-color: var(--turquoise); }
.feature-icon { font-size: 40px; margin-bottom: 16px; }
.feature-title { font-size: 20px; font-weight: 700; margin-bottom: 8px; }
.feature-desc { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }

/* About Section */
.about-section { padding: 100px 40px; background: var(--bg-primary); }
.about-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 40px; }
.about-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 40px; box-shadow: var(--card-shadow); }
.about-card h3 { font-size: 22px; font-weight: 700; margin-bottom: 16px; color: var(--turquoise); }
.about-card p { font-size: 15px; color: var(--text-secondary); line-height: 1.8; }

/* CTA */
.cta-section {
    padding: 80px 40px;
    background: var(--turquoise-gradient);
    text-align: center; color: #fff;
}
.cta-section h2 { font-size: 36px; font-weight: 800; margin-bottom: 12px; }
.cta-section p { font-size: 16px; opacity: 0.9; margin-bottom: 32px; }
.cta-section .btn { background: #fff; color: var(--turquoise); font-weight: 700; padding: 16px 36px; font-size: 16px; }
.cta-section .btn:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.15); }

/* Footer */
.landing-footer {
    padding: 40px; background: var(--text-primary); color: rgba(255,255,255,0.6); text-align: center; font-size: 14px;
}
.landing-footer a { color: var(--turquoise-light); }

/* ---- Responsive ---- */
@media (max-width: 768px) {
    .sidebar { transform: translateX(-100%); width: 280px; z-index: 200; }
    .sidebar.open { transform: translateX(0); box-shadow: var(--shadow-lg); }
    .main-content { margin-left: 0; padding: 16px; }
    .stats-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
    .stat-card { padding: 16px; }
    .stat-value { font-size: 24px; }
    .page-title { font-size: 22px; }
    .form-row { grid-template-columns: 1fr; }
    .data-table { font-size: 13px; }
    .data-table th, .data-table td { padding: 10px 12px; }
    .table-actions { width: 100%; }
    .search-box input { width: 100%; }
    .modal { width: 95%; margin: 0 10px; }
    .login-card { padding: 32px 24px; }
    .mobile-menu-btn { display: flex !important; }
    .hero h1 { font-size: 32px; }
    .hero { padding: 120px 20px 60px; }
    .features-section, .about-section { padding: 60px 20px; }
    .landing-nav { padding: 0 16px; }
    .landing-nav-links { display: none; }
    .features-grid { grid-template-columns: 1fr; }
    .about-grid { grid-template-columns: 1fr; }
}

.mobile-menu-btn {
    display: none; align-items: center; justify-content: center;
    width: 40px; height: 40px; background: #fff;
    border: 1px solid var(--border); border-radius: var(--radius-sm);
    color: var(--text-primary); font-size: 20px; cursor: pointer;
}
.mobile-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.3); z-index: 150; display: none; }
.mobile-overlay.active { display: block; }

/* Page sections */
.page-section { display: none; }
.page-section.active { display: block; }

/* ---- Utility ---- */
.d-flex { display: flex; }
.align-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-8 { gap: 8px; }
.gap-12 { gap: 12px; }
.gap-16 { gap: 16px; }
.gap-24 { gap: 24px; }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--text-muted); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-warning { color: var(--warning); }
.text-turquoise { color: var(--turquoise); }
.fw-600 { font-weight: 600; }
.fw-700 { font-weight: 700; }
.fs-12 { font-size: 12px; }
.fs-14 { font-size: 14px; }
.w-100 { width: 100%; }
.hidden { display: none !important; }