/* ==========================================================================
   TRX10 Referral & OxaPay Platform - Ultimate Modern UI/UX Design System
   ========================================================================== */
@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&family=Space+Grotesk:wght@500;600;700&display=swap');

:root {
    /* Color Palette */
    --bg-dark: #070d10;
    --bg-darker: #04080a;
    --bg-card: rgba(13, 25, 30, 0.75);
    --bg-card-hover: rgba(18, 34, 42, 0.88);
    --bg-glass: rgba(15, 30, 36, 0.65);
    
    --primary: #00f29d;
    --primary-glow: rgba(0, 242, 157, 0.35);
    --primary-dark: #00b374;
    --primary-light: #6affc8;

    --accent: #00d2ff;
    --accent-glow: rgba(0, 210, 255, 0.35);
    
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #38bdf8;

    --text-main: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #8497a6;
    --border-color: rgba(0, 242, 157, 0.12);
    --border-hover: rgba(0, 242, 157, 0.32);
    --border-subtle: rgba(255, 255, 255, 0.08);

    /* Shadows & Glows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.6);
    --glow-primary: 0 0 24px var(--primary-glow);
    --glow-accent: 0 0 24px var(--accent-glow);

    /* Radii */
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

/* ── Reset & Base ── */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-dark);
    background-image: 
        radial-gradient(circle at 15% 15%, rgba(0, 242, 157, 0.07) 0%, transparent 40%),
        radial-gradient(circle at 85% 75%, rgba(0, 210, 255, 0.07) 0%, transparent 45%),
        linear-gradient(180deg, #070d10 0%, #04080a 100%);
    background-attachment: fixed;
    color: var(--text-main);
    min-height: 100vh;
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: var(--transition-fast);
}
a:hover {
    color: var(--primary-light);
}

.font-mono { font-family: 'Space Grotesk', monospace, sans-serif; }

/* ── Layout Containers ── */
.container {
    width: min(1200px, calc(100% - 40px));
    margin: 0 auto;
}
.section {
    padding: 70px 0;
}
.section-sm {
    padding: 40px 0;
}

/* ── Modern Topbar & Navigation ── */
.topbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(7, 13, 16, 0.82);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-subtle);
    transition: var(--transition-normal);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 76px;
}

.brand-wrap {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    text-decoration: none !important;
}

.brand-badge {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, #00f29d 0%, #00d2ff 100%);
    color: #04080a;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.35rem;
    font-weight: 800;
    box-shadow: 0 4px 18px var(--primary-glow);
    transition: var(--transition-normal);
}
.brand-wrap:hover .brand-badge {
    transform: scale(1.05) rotate(3deg);
    box-shadow: 0 6px 24px var(--primary-glow);
}

.brand-text {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.45rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: #fff;
    display: flex;
    align-items: center;
    gap: 6px;
}

.admin-brand .brand-badge {
    background: linear-gradient(135deg, #f59e0b 0%, #ef4444 100%);
    box-shadow: 0 4px 18px rgba(245, 158, 11, 0.35);
}

/* Nav Links */
nav {
    display: flex;
    align-items: center;
    gap: 6px;
}
nav a {
    color: var(--text-secondary);
    font-size: 0.92rem;
    font-weight: 600;
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}
nav a:hover, nav a.active {
    color: #fff;
    background: rgba(0, 242, 157, 0.08);
}
nav a.active {
    color: var(--primary);
    background: rgba(0, 242, 157, 0.12);
}

/* Mobile Hamburger Button */
.menu-toggle {
    display: none;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    color: var(--text-main);
    padding: 8px 10px;
    cursor: pointer;
    transition: var(--transition-fast);
}
.menu-toggle:hover {
    background: rgba(0, 242, 157, 0.1);
    border-color: var(--border-color);
}

/* Mobile Nav Drawer */
.mobile-nav {
    display: none;
    flex-direction: column;
    background: rgba(7, 13, 16, 0.98);
    border-bottom: 1px solid var(--border-color);
    padding: 16px 20px;
    gap: 6px;
    animation: slideDown 0.3s ease forwards;
}
@keyframes slideDown {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}
.mobile-nav.open {
    display: flex;
}
.mobile-nav a {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    color: var(--text-secondary);
    border: 1px solid transparent;
}
.mobile-nav a:hover, .mobile-nav a.active {
    color: var(--primary);
    background: rgba(0, 242, 157, 0.08);
    border-color: var(--border-color);
}

/* ── Modern Cards & Glassmorphism ── */
.glass-card, .card, .panel, .auth-card {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
}
.glass-card:hover {
    border-color: var(--border-hover);
}

.card {
    padding: 24px;
}
.card-header-flex {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-subtle);
    flex-wrap: wrap;
    gap: 12px;
}
.card-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: #fff;
}
.card-subtitle {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ── Grid System ── */
.grid { display: grid; gap: 20px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

/* ── Modern Buttons ── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: inherit;
    font-size: 0.92rem;
    font-weight: 700;
    padding: 11px 22px;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    transition: var(--transition-normal);
    text-decoration: none !important;
    white-space: nowrap;
}
.btn:hover {
    transform: translateY(-2px);
}
.btn:active {
    transform: translateY(0);
}

.btn-primary {
    background: linear-gradient(135deg, #00f29d 0%, #00b374 100%);
    color: #041009;
    box-shadow: 0 4px 16px var(--primary-glow);
}
.btn-primary:hover {
    background: linear-gradient(135deg, #26ffb0 0%, #00d48a 100%);
    box-shadow: 0 6px 24px rgba(0, 242, 157, 0.55);
    color: #041009;
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-main);
    border: 1px solid var(--border-subtle);
}
.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--border-color);
    color: #fff;
}

.btn-light {
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-secondary);
    border: 1px solid var(--border-subtle);
}
.btn-light:hover {
    background: rgba(255, 255, 255, 0.08);
    color: #fff;
}

.btn-danger {
    background: linear-gradient(135deg, #ef4444 0%, #b91c1c 100%);
    color: #fff;
    box-shadow: 0 4px 14px rgba(239, 68, 68, 0.35);
}
.btn-danger:hover {
    background: linear-gradient(135deg, #f87171 0%, #dc2626 100%);
    box-shadow: 0 6px 20px rgba(239, 68, 68, 0.5);
}

.btn-success {
    background: linear-gradient(135deg, #10b981 0%, #047857 100%);
    color: #fff;
}

.btn-ghost {
    background: transparent;
    color: var(--text-muted);
}
.btn-ghost:hover {
    color: var(--text-main);
    background: rgba(255, 255, 255, 0.05);
}

.btn-sm { padding: 8px 16px; font-size: 0.85rem; border-radius: var(--radius-sm); }
.btn-xs { padding: 6px 12px; font-size: 0.78rem; border-radius: var(--radius-sm); }
.btn-lg { padding: 14px 28px; font-size: 1.05rem; border-radius: var(--radius-md); }
.full, .btn-full { width: 100%; }

/* ── Hero Section ── */
.hero {
    position: relative;
    padding: 80px 0 60px;
    overflow: hidden;
}
.hero-grid {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    gap: 40px;
    align-items: center;
}
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(0, 242, 157, 0.1);
    border: 1px solid var(--border-color);
    padding: 6px 14px;
    border-radius: var(--radius-full);
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}
.hero h1 {
    font-size: clamp(2.4rem, 4.5vw, 3.8rem);
    font-weight: 800;
    line-height: 1.12;
    letter-spacing: -0.03em;
    color: #fff;
    margin-bottom: 18px;
}
.text-gradient {
    background: linear-gradient(135deg, #00f29d 0%, #00d2ff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.hero .lead {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.65;
    margin-bottom: 28px;
    max-width: 580px;
}
.cta-row {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
}

/* Floating Card in Hero */
.hero-card {
    padding: 32px;
    position: relative;
    border-radius: var(--radius-xl);
    background: linear-gradient(145deg, rgba(16, 32, 40, 0.85), rgba(8, 16, 20, 0.95));
    border: 1px solid rgba(0, 242, 157, 0.2);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6), 0 0 30px rgba(0, 242, 157, 0.1);
}
.hero-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-subtle);
}
.tier-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 18px;
    margin-bottom: 10px;
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-subtle);
    transition: var(--transition-fast);
}
.tier-item:hover {
    background: rgba(0, 242, 157, 0.06);
    border-color: var(--border-color);
}
.tier-label {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    color: var(--text-main);
}
.tier-pct {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--primary);
}

/* ── Modern Stat & Metric Cards ── */
.stat-card {
    display: flex;
    align-items: center;
    gap: 18px;
    padding: 22px 24px;
}
.stat-icon-wrap {
    width: 52px;
    height: 52px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.icon-primary { background: rgba(0, 242, 157, 0.12); color: var(--primary); }
.icon-accent  { background: rgba(0, 210, 255, 0.12); color: var(--accent); }
.icon-warning { background: rgba(245, 158, 11, 0.12); color: var(--warning); }
.icon-info    { background: rgba(56, 189, 248, 0.12); color: var(--info); }
.icon-danger  { background: rgba(239, 68, 68, 0.12);  color: var(--danger); }

.stat-content {
    display: flex;
    flex-direction: column;
    gap: 2px;
}
.stat-label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.stat-value {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.55rem;
    font-weight: 700;
    color: #fff;
}

.card-metric {
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.metric-label {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.metric-num {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.85rem;
    font-weight: 800;
    color: var(--primary);
    line-height: 1.2;
}
.metric-sub {
    font-size: 0.82rem;
    color: var(--text-muted);
}

/* ── Referral Link Copy Banner ── */
.referral-banner {
    padding: 24px;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, rgba(0, 242, 157, 0.08) 0%, rgba(0, 210, 255, 0.05) 100%);
    border: 1px solid var(--border-color);
    margin-bottom: 24px;
}
.copy-input-group {
    display: flex;
    gap: 8px;
    margin-top: 12px;
}
.copy-input-group input {
    font-family: 'Space Grotesk', monospace;
    font-size: 0.92rem;
    background: rgba(5, 12, 15, 0.8);
    border: 1px solid var(--border-subtle);
    color: var(--primary);
}

/* ── Modern Interactive Tables ── */
.table-responsive {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}
.modern-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 620px;
}
.modern-table thead th {
    background: rgba(255, 255, 255, 0.02);
    padding: 14px 20px;
    font-size: 0.76rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border-subtle);
    text-align: left;
    white-space: nowrap;
}
.modern-table tbody td {
    padding: 16px 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    color: var(--text-main);
    font-size: 0.92rem;
    vertical-align: middle;
}
.modern-table tbody tr:hover td {
    background: rgba(0, 242, 157, 0.03);
}
.modern-table tbody tr:last-child td {
    border-bottom: none;
}

/* ── Badges & Status Pills ── */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.03em;
    text-transform: uppercase;
}
.badge-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: currentColor;
}
.badge-success { background: rgba(16, 185, 129, 0.15); color: #34d399; }
.badge-warning { background: rgba(245, 158, 11, 0.15); color: #fbbf24; }
.badge-danger  { background: rgba(239, 68, 68, 0.15);  color: #f87171; }
.badge-info    { background: rgba(56, 189, 248, 0.15); color: #38bdf8; }
.badge-accent  { background: rgba(0, 242, 157, 0.15);  color: var(--primary); }
.badge-neutral { background: rgba(255, 255, 255, 0.08); color: var(--text-secondary); }

/* Compatibility status badges */
.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 11px;
    border-radius: var(--radius-full);
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
}
.status-verified, .status-approved, .status-completed { background: rgba(16, 185, 129, 0.15); color: #34d399; }
.status-unverified, .status-pending, .status-processing { background: rgba(245, 158, 11, 0.15); color: #fbbf24; }
.status-blocked, .status-rejected, .status-failed { background: rgba(239, 68, 68, 0.15); color: #f87171; }

/* ── Modern Form Controls ── */
.form-grid { display: grid; gap: 18px; }
.field { display: flex; flex-direction: column; gap: 7px; }
.field label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
}

input, select, textarea {
    width: 100%;
    background: rgba(7, 15, 18, 0.75);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 12px 16px;
    color: #fff;
    font-family: inherit;
    font-size: 0.95rem;
    transition: var(--transition-fast);
    outline: none;
}
input:focus, select:focus, textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0, 242, 157, 0.18);
    background: rgba(10, 22, 28, 0.9);
}
input::placeholder, textarea::placeholder {
    color: var(--text-muted);
}
input:disabled, select:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}
select option {
    background: #091418;
    color: #fff;
}

/* Checkbox */
.checkbox {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    cursor: pointer;
    color: var(--text-secondary);
}
.checkbox input {
    width: 18px;
    height: 18px;
    accent-color: var(--primary);
    cursor: pointer;
}

/* ── Alerts ── */
.alert {
    padding: 14px 18px;
    border-radius: var(--radius-md);
    margin-bottom: 20px;
    font-size: 0.92rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 10px;
}
.alert-success, .alert.success { background: rgba(16, 185, 129, 0.12); color: #6ee7b7; border: 1px solid rgba(16, 185, 129, 0.3); }
.alert-error, .alert.error     { background: rgba(239, 68, 68, 0.12);   color: #fca5a5; border: 1px solid rgba(239, 68, 68, 0.3); }
.alert-warning, .alert.warning { background: rgba(245, 158, 11, 0.12);  color: #fde68a; border: 1px solid rgba(245, 158, 11, 0.3); }
.alert-info, .alert.info       { background: rgba(56, 189, 248, 0.12);  color: #bae6fd; border: 1px solid rgba(56, 189, 248, 0.3); }

/* ── Page Header / Title Wrap ── */
.page-title-wrap {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 28px;
    flex-wrap: wrap;
    gap: 16px;
}
.page-title {
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    color: #fff;
}

/* ── Auth Pages ── */
.auth-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
}
.auth-shell {
    width: min(520px, 100%);
}
.auth-shell.narrow {
    width: min(440px, 100%);
}
.auth-card {
    padding: 36px 32px;
}
.auth-header {
    text-align: center;
    margin-bottom: 26px;
}
.auth-title {
    font-size: 1.8rem;
    font-weight: 800;
    color: #fff;
    margin-top: 12px;
}
.auth-footer {
    text-align: center;
    margin-top: 24px;
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* ── Modal ── */
.modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(8px);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}
.modal-box {
    background: #0b171c;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    width: min(600px, 100%);
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.8);
    overflow: hidden;
}
.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-subtle);
}
.modal-title { font-size: 1.15rem; font-weight: 700; color: #fff; }
.modal-close {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
}
.modal-close:hover { color: #fff; }
.modal-body { padding: 24px; }
.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    padding: 16px 24px;
    background: rgba(0, 0, 0, 0.2);
    border-top: 1px solid var(--border-subtle);
}
.code-block {
    background: #04090c;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    padding: 14px;
    font-family: 'Space Grotesk', monospace;
    font-size: 0.82rem;
    color: var(--primary);
    max-height: 250px;
    overflow-y: auto;
    white-space: pre-wrap;
    word-break: break-all;
}

/* ── Interactive Calculator (Landing Page) ── */
.calc-card {
    background: linear-gradient(145deg, rgba(16, 32, 40, 0.9), rgba(8, 18, 22, 0.95));
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 36px;
    box-shadow: var(--shadow-lg);
}
.calc-slider {
    width: 100%;
    height: 8px;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.1);
    outline: none;
    accent-color: var(--primary);
    cursor: pointer;
}
.calc-result-box {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-top: 24px;
}
.calc-res-item {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 16px;
    text-align: center;
}
.calc-res-label { font-size: 0.78rem; color: var(--text-muted); text-transform: uppercase; font-weight: 700; margin-bottom: 4px; }
.calc-res-val { font-family: 'Space Grotesk', sans-serif; font-size: 1.4rem; font-weight: 800; color: var(--primary); }

/* ── Modern FAQ Accordion ── */
.accordion {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.accordion-item {
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    background: var(--bg-card);
    overflow: hidden;
    transition: var(--transition-fast);
}
.accordion-item:hover {
    border-color: var(--border-color);
}
.accordion-header {
    width: 100%;
    padding: 18px 22px;
    background: none;
    border: none;
    color: #fff;
    font-size: 1rem;
    font-weight: 700;
    font-family: inherit;
    text-align: left;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
}
.accordion-icon {
    transition: transform 0.3s ease;
    color: var(--primary);
}
.accordion-item.active .accordion-icon {
    transform: rotate(180deg);
}
.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out;
    padding: 0 22px;
    color: var(--text-secondary);
    font-size: 0.92rem;
    line-height: 1.6;
}
.accordion-item.active .accordion-content {
    max-height: 200px;
    padding-bottom: 18px;
}

/* ── Modern Footer ── */
.footer {
    background: #030608;
    border-top: 1px solid var(--border-subtle);
    padding: 36px 0;
    color: var(--text-muted);
    font-size: 0.9rem;
}
.footer-flex {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}
.footer-links {
    display: flex;
    gap: 20px;
}
.footer-links a {
    color: var(--text-secondary);
    font-weight: 600;
}
.footer-links a:hover {
    color: var(--primary);
}

/* ── Utility Classes ── */
.text-center { text-align: center; }
.text-right  { text-align: right; }
.text-primary{ color: var(--primary); }
.text-accent { color: var(--accent); }
.text-warning{ color: var(--warning); }
.text-success{ color: var(--success); }
.text-danger { color: var(--danger); }
.text-info   { color: var(--info); }
.text-muted  { color: var(--text-muted); }
.text-sm     { font-size: 0.875rem; }
.text-xs     { font-size: 0.75rem; }
.font-bold   { font-weight: 700; }
.font-semibold{ font-weight: 600; }
.uppercase   { text-transform: uppercase; }

.mb-1 { margin-bottom: 4px; }
.mb-2 { margin-bottom: 8px; }
.mb-3 { margin-bottom: 12px; }
.mb-4 { margin-bottom: 18px; }
.mb-5 { margin-bottom: 28px; }
.mt-2 { margin-top: 8px; }
.mt-3 { margin-top: 12px; }
.mt-4 { margin-top: 18px; }
.py-5 { padding-top: 32px; padding-bottom: 32px; }

.action-group {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}
.justify-end { justify-content: flex-end; }
.inline-form { display: inline-flex; }

/* ==========================================================================
   RESPONSIVE DESIGN (ALL DEVICES)
   ========================================================================== */
@media (max-width: 1024px) {
    .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .calc-result-box { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    /* Navbar switch to hamburger */
    #admin-nav-desktop, #user-nav-desktop, nav#publicNav {
        display: none !important;
    }
    .menu-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .hero {
        padding: 50px 0 40px;
    }
    .hero-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    .hero h1 {
        font-size: 2.3rem;
    }
    .hero .lead {
        font-size: 1rem;
    }
    .cta-row .btn {
        width: 100%;
    }

    .grid-4, .grid-3, .grid-2, .form-grid.two-col, .form-grid.three-col {
        grid-template-columns: 1fr !important;
    }

    .page-title-wrap {
        flex-direction: column;
        align-items: flex-start;
    }
    .page-title-wrap .action-group {
        width: 100%;
    }
    .page-title-wrap .action-group .btn {
        width: 100%;
    }

    .auth-card {
        padding: 24px 20px;
    }

    .footer-flex {
        flex-direction: column;
        text-align: center;
    }
    .footer-links {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .copy-input-group {
        flex-direction: column;
    }
    .copy-input-group .btn {
        width: 100%;
    }
    .stat-card {
        padding: 16px;
    }
    .stat-icon-wrap {
        width: 44px;
        height: 44px;
    }
}