/**
 * EaonLedger Premium Design System
 * Unified navy + gold aesthetic across public, portal, and admin
 */
:root {
    --el-navy-950: #020617;
    --el-navy-900: #0f172a;
    --el-navy-800: #1e293b;
    --el-gold-400: #d4af37;
    --el-gold-500: #c9a227;
    --el-gold-600: #a8871e;
    --el-champagne: #e8dcc4;
    --el-surface: #f8fafc;
    --el-surface-elevated: #ffffff;
    --el-border: rgba(148, 163, 184, 0.22);
    --el-border-strong: rgba(100, 116, 139, 0.35);
    --el-shadow-sm: 0 1px 2px rgba(2, 6, 23, 0.04), 0 1px 3px rgba(2, 6, 23, 0.06);
    --el-shadow-md: 0 4px 24px -6px rgba(2, 6, 23, 0.1);
    --el-shadow-lg: 0 20px 50px -16px rgba(2, 6, 23, 0.18);
    --el-shadow-gold: 0 8px 32px -8px rgba(201, 162, 39, 0.35);
    --el-radius: 0.875rem;
    --el-radius-lg: 1.125rem;
    --el-radius-xl: 1.25rem;
    --el-transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.dark {
    --el-surface: #0f172a;
    --el-surface-elevated: #1e293b;
    --el-border: rgba(71, 85, 105, 0.45);
    --el-border-strong: rgba(100, 116, 139, 0.5);
}

/* Typography */
.font-display,
.display-title {
    font-family: 'Syne', 'Outfit', system-ui, sans-serif;
    font-weight: 800;
    letter-spacing: -0.04em;
    line-height: 1.02;
}

.tabular-nums {
    font-variant-numeric: tabular-nums;
}

body {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

/* Language bar — refined minimal chrome */
.site-language-bar {
    background: linear-gradient(180deg, var(--el-navy-950) 0%, var(--el-navy-900) 100%) !important;
    border-bottom: 1px solid rgba(212, 175, 55, 0.12) !important;
    backdrop-filter: blur(8px);
}

.site-language-bar select {
    background: rgba(30, 41, 59, 0.8) !important;
    border-color: rgba(100, 116, 139, 0.4) !important;
    font-weight: 500;
    transition: border-color var(--el-transition), box-shadow var(--el-transition);
}

.site-language-bar select:focus {
    border-color: var(--el-gold-500) !important;
    box-shadow: 0 0 0 3px rgba(201, 162, 39, 0.15);
}

/* Auth pages */
.auth-panel {
    position: relative;
    overflow: hidden;
}

.auth-panel::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--el-gold-500), transparent);
    z-index: 20;
    opacity: 0.7;
}

.auth-panel-accent {
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, var(--el-gold-400), var(--el-gold-600));
    z-index: 15;
}

.auth-card {
    background: var(--el-surface-elevated);
    border: 1px solid var(--el-border);
    border-radius: var(--el-radius-xl);
    box-shadow: var(--el-shadow-md);
    padding: 2rem;
}

.dark .auth-card {
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(12px);
}

.auth-form-input {
    width: 100%;
    padding: 0.7rem 1rem;
    border: 1px solid var(--el-border-strong);
    border-radius: var(--el-radius);
    background: var(--el-surface-elevated);
    color: var(--el-navy-900);
    font-size: 0.9375rem;
    transition: border-color var(--el-transition), box-shadow var(--el-transition);
}

.dark .auth-form-input {
    background: rgba(15, 23, 42, 0.8);
    border-color: rgba(71, 85, 105, 0.6);
    color: #f1f5f9;
}

.auth-form-input:focus {
    outline: none;
    border-color: var(--el-gold-500);
    box-shadow: 0 0 0 3px rgba(201, 162, 39, 0.15);
}

/* Buttons */
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    width: 100%;
    padding: 0.8rem 1.5rem;
    border: none;
    border-radius: var(--el-radius);
    background: linear-gradient(135deg, var(--el-navy-900) 0%, var(--el-navy-800) 100%);
    color: #fff;
    font-weight: 600;
    font-size: 0.9375rem;
    letter-spacing: 0.01em;
    cursor: pointer;
    transition: transform var(--el-transition), box-shadow var(--el-transition), filter var(--el-transition);
    box-shadow: var(--el-shadow-sm);
}

.btn-primary:hover {
    filter: brightness(1.08);
    box-shadow: var(--el-shadow-md);
    transform: translateY(-1px);
}

.btn-primary-gold {
    background: linear-gradient(135deg, var(--el-gold-400) 0%, var(--el-gold-600) 100%);
    color: var(--el-navy-950);
    box-shadow: var(--el-shadow-gold);
}

.btn-primary-gold:hover {
    filter: brightness(1.05);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: 1px solid var(--el-border-strong);
    border-radius: var(--el-radius);
    background: transparent;
    color: inherit;
    font-weight: 600;
    font-size: 0.9375rem;
    transition: background var(--el-transition), border-color var(--el-transition);
}

.btn-secondary:hover {
    background: rgba(148, 163, 184, 0.08);
    border-color: var(--el-gold-500);
}

/* Alerts */
.alert {
    padding: 0.875rem 1rem;
    border-radius: var(--el-radius);
    font-size: 0.875rem;
    line-height: 1.5;
    border: 1px solid transparent;
}

.alert-success {
    background: rgba(16, 185, 129, 0.1);
    border-color: rgba(16, 185, 129, 0.25);
    color: #047857;
}

.dark .alert-success {
    background: rgba(16, 185, 129, 0.12);
    color: #6ee7b7;
}

.alert-error {
    background: rgba(239, 68, 68, 0.08);
    border-color: rgba(239, 68, 68, 0.22);
    color: #b91c1c;
}

.dark .alert-error {
    background: rgba(239, 68, 68, 0.12);
    color: #fca5a5;
}

/* Marketing cards */
.premium-card {
    background: var(--el-surface-elevated);
    border: 1px solid var(--el-border);
    border-radius: var(--el-radius-xl);
    box-shadow: var(--el-shadow-sm);
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.35s ease;
}

.premium-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--el-shadow-lg);
}

.dark .premium-card {
    background: rgba(15, 23, 42, 0.85);
    border-color: rgba(71, 85, 105, 0.45);
}

/* Hero refinements */
.hero-lead {
    color: rgba(226, 232, 240, 0.92);
    font-size: 1.125rem;
    line-height: 1.75;
    max-width: 32rem;
}

.hero-lead-accent {
    color: var(--el-champagne);
    font-weight: 500;
}

/* Section headings on marketing pages */
.section-heading {
    font-family: 'Syne', 'Outfit', system-ui, sans-serif;
    font-weight: 800;
    letter-spacing: -0.04em;
}

/* Trust & stats */
.stat-value {
    font-variant-numeric: tabular-nums;
    font-weight: 800;
    letter-spacing: -0.02em;
}

/* Logo mark — consistent everywhere */
.el-logo-mark {
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 0.75rem;
    background: linear-gradient(145deg, var(--el-gold-400), var(--el-gold-600));
    color: var(--el-navy-950);
    font-weight: 800;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--el-shadow-gold);
    letter-spacing: -0.02em;
}

/* Nav CTA refinement */
.nav-cta-primary {
    background: linear-gradient(135deg, var(--el-navy-900), var(--el-navy-800)) !important;
    border: 1px solid rgba(212, 175, 55, 0.2);
    box-shadow: var(--el-shadow-sm);
    transition: all var(--el-transition);
}

.nav-cta-primary:hover {
    border-color: rgba(212, 175, 55, 0.45);
    box-shadow: var(--el-shadow-md);
}

.dark .nav-cta-primary {
    background: linear-gradient(135deg, var(--el-gold-400), var(--el-gold-600)) !important;
    color: var(--el-navy-950) !important;
    border-color: transparent;
}

/* Footer refinement */
.site-footer {
    background: linear-gradient(180deg, var(--el-navy-950) 0%, #010409 100%);
}

/* Portal & admin shared elevation */
.portal-card,
.admin-card {
    box-shadow: var(--el-shadow-sm) !important;
}

.portal-topbar {
    backdrop-filter: blur(12px);
    box-shadow: 0 1px 0 var(--el-border);
}

/* Scrollbar polish (webkit) */
.portal-nav::-webkit-scrollbar,
.admin-nav::-webkit-scrollbar {
    width: 4px;
}

.portal-nav::-webkit-scrollbar-thumb,
.admin-nav::-webkit-scrollbar-thumb {
    background: rgba(100, 116, 139, 0.4);
    border-radius: 4px;
}