/* ═══════════════════════════════════════════════════════════════
   🧬 Cepha Material UI — Financial-Grade Design System
   ═══════════════════════════════════════════════════════════════
   Built for banking/fintech UIs running in Cepha WASM MVC.
   All components use CSS custom properties for theming.
   Secure by default — works with CephaSecurity shadow inputs.
   ═══════════════════════════════════════════════════════════════ */

/* ── Design Tokens ────────────────────────────────────────────── */

:root {
    /* Primary palette */
    --cepha-primary: #667eea;
    --cepha-primary-dark: #5a67d8;
    --cepha-primary-light: #a3bffa;
    --cepha-primary-alpha: rgba(102, 126, 234, 0.15);
    --cepha-focus-ring: rgba(102, 126, 234, 0.25);

    /* Secondary palette */
    --cepha-secondary: #764ba2;
    --cepha-secondary-dark: #6b46a3;

    /* Semantic colors */
    --cepha-success: #48bb78;
    --cepha-warning: #ed8936;
    --cepha-danger: #f56565;
    --cepha-info: #4299e1;

    /* Surface & text */
    --cepha-bg: #ffffff;
    --cepha-surface: #f7fafc;
    --cepha-surface-elevated: #ffffff;
    --cepha-text: #1a202c;
    --cepha-text-secondary: #718096;
    --cepha-placeholder: #a0aec0;
    --cepha-label: #4a5568;
    --cepha-border: #e2e8f0;
    --cepha-divider: #edf2f7;

    /* Input */
    --cepha-input-bg: #ffffff;
    --cepha-input-disabled-bg: #f7fafc;

    /* Shadows */
    --cepha-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --cepha-shadow: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
    --cepha-shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.06);
    --cepha-shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);
    --cepha-shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1), 0 10px 10px rgba(0, 0, 0, 0.04);

    /* Typography */
    --cepha-font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --cepha-font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;

    /* Spacing scale */
    --cepha-space-xs: 4px;
    --cepha-space-sm: 8px;
    --cepha-space-md: 16px;
    --cepha-space-lg: 24px;
    --cepha-space-xl: 32px;
    --cepha-space-2xl: 48px;

    /* Radius */
    --cepha-radius-sm: 4px;
    --cepha-radius: 8px;
    --cepha-radius-lg: 12px;
    --cepha-radius-xl: 16px;
    --cepha-radius-full: 9999px;

    /* Transition */
    --cepha-transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --cepha-transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── Dark Theme ──────────────────────────────────────────────── */

[data-theme="dark"] {
    --cepha-bg: #1a202c;
    --cepha-surface: #2d3748;
    --cepha-surface-elevated: #4a5568;
    --cepha-text: #f7fafc;
    --cepha-text-secondary: #a0aec0;
    --cepha-placeholder: #718096;
    --cepha-label: #a0aec0;
    --cepha-border: #4a5568;
    --cepha-divider: #2d3748;
    --cepha-input-bg: #2d3748;
    --cepha-input-disabled-bg: #1a202c;
    --cepha-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --cepha-shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
    --cepha-shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
}

/* ── Global Reset ────────────────────────────────────────────── */

.cepha-ui, .cepha-ui * {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

.cepha-ui {
    font-family: var(--cepha-font);
    color: var(--cepha-text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ── Typography ──────────────────────────────────────────────── */

.cepha-h1 { font-size: 2rem; font-weight: 700; line-height: 1.2; letter-spacing: -0.025em; }
.cepha-h2 { font-size: 1.5rem; font-weight: 600; line-height: 1.3; letter-spacing: -0.02em; }
.cepha-h3 { font-size: 1.25rem; font-weight: 600; line-height: 1.4; }
.cepha-h4 { font-size: 1.125rem; font-weight: 600; line-height: 1.4; }
.cepha-body { font-size: 1rem; line-height: 1.6; }
.cepha-body-sm { font-size: 0.875rem; line-height: 1.5; }
.cepha-caption { font-size: 0.75rem; color: var(--cepha-text-secondary); }
.cepha-mono { font-family: var(--cepha-font-mono); font-size: 0.875rem; }

/* ── Buttons ─────────────────────────────────────────────────── */

.cepha-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--cepha-space-sm);
    padding: 10px 20px;
    font-size: 0.875rem;
    font-weight: 600;
    font-family: inherit;
    border: none;
    border-radius: var(--cepha-radius);
    cursor: pointer;
    transition: all var(--cepha-transition);
    outline: none;
    text-decoration: none;
    white-space: nowrap;
    user-select: none;
    position: relative;
    overflow: hidden;
}

.cepha-btn::after {
    content: '';
    position: absolute;
    inset: 0;
    background: currentColor;
    opacity: 0;
    transition: opacity var(--cepha-transition-fast);
}

.cepha-btn:hover::after { opacity: 0.08; }
.cepha-btn:active::after { opacity: 0.15; }

.cepha-btn:focus-visible {
    box-shadow: 0 0 0 3px var(--cepha-focus-ring);
}

.cepha-btn-primary {
    background: linear-gradient(135deg, var(--cepha-primary), var(--cepha-secondary));
    color: #fff;
}

.cepha-btn-secondary {
    background: transparent;
    color: var(--cepha-primary);
    border: 2px solid var(--cepha-primary);
}

.cepha-btn-ghost {
    background: transparent;
    color: var(--cepha-text);
}

.cepha-btn-danger {
    background: var(--cepha-danger);
    color: #fff;
}

.cepha-btn-success {
    background: var(--cepha-success);
    color: #fff;
}

.cepha-btn-sm { padding: 6px 12px; font-size: 0.75rem; }
.cepha-btn-lg { padding: 14px 28px; font-size: 1rem; }

.cepha-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

/* Ripple effect container */
.cepha-btn .cepha-ripple {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.35);
    transform: scale(0);
    animation: cepha-ripple-anim 0.6s ease-out;
    pointer-events: none;
}

@keyframes cepha-ripple-anim {
    to { transform: scale(4); opacity: 0; }
}

/* ── Text Inputs ─────────────────────────────────────────────── */

.cepha-input-group {
    position: relative;
    margin-bottom: var(--cepha-space-md);
}

.cepha-input {
    width: 100%;
    padding: 14px 16px;
    font-size: 1rem;
    font-family: inherit;
    border: 2px solid var(--cepha-border);
    border-radius: var(--cepha-radius);
    background: var(--cepha-input-bg);
    color: var(--cepha-text);
    outline: none;
    transition: border-color var(--cepha-transition), box-shadow var(--cepha-transition);
}

.cepha-input:focus {
    border-color: var(--cepha-primary);
    box-shadow: 0 0 0 3px var(--cepha-focus-ring);
}

.cepha-input::placeholder { color: var(--cepha-placeholder); }

.cepha-input:disabled {
    background: var(--cepha-input-disabled-bg);
    cursor: not-allowed;
    opacity: 0.6;
}

.cepha-input-error {
    border-color: var(--cepha-danger) !important;
    box-shadow: 0 0 0 3px rgba(245, 101, 101, 0.15) !important;
}

.cepha-input-label {
    display: block;
    margin-bottom: 6px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--cepha-label);
}

.cepha-input-hint {
    margin-top: 4px;
    font-size: 0.75rem;
    color: var(--cepha-text-secondary);
}

.cepha-input-error-text {
    margin-top: 4px;
    font-size: 0.75rem;
    color: var(--cepha-danger);
}

/* Floating label */
.cepha-float-label {
    position: relative;
}

.cepha-float-label .cepha-input {
    padding-top: 20px;
    padding-bottom: 8px;
}

.cepha-float-label label {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1rem;
    color: var(--cepha-placeholder);
    pointer-events: none;
    transition: all var(--cepha-transition);
}

.cepha-float-label .cepha-input:focus ~ label,
.cepha-float-label .cepha-input:not(:placeholder-shown) ~ label {
    top: 8px;
    transform: translateY(0);
    font-size: 0.7rem;
    color: var(--cepha-primary);
}

/* ── Cards ───────────────────────────────────────────────────── */

.cepha-card {
    background: var(--cepha-surface-elevated);
    border: 1px solid var(--cepha-border);
    border-radius: var(--cepha-radius-lg);
    box-shadow: var(--cepha-shadow);
    overflow: hidden;
    transition: box-shadow var(--cepha-transition), transform var(--cepha-transition);
}

.cepha-card:hover {
    box-shadow: var(--cepha-shadow-md);
}

.cepha-card-header {
    padding: var(--cepha-space-lg);
    border-bottom: 1px solid var(--cepha-divider);
}

.cepha-card-body {
    padding: var(--cepha-space-lg);
}

.cepha-card-footer {
    padding: var(--cepha-space-md) var(--cepha-space-lg);
    border-top: 1px solid var(--cepha-divider);
    background: var(--cepha-surface);
}

.cepha-card-elevated {
    box-shadow: var(--cepha-shadow-lg);
    border: none;
}

/* ── App Bar ─────────────────────────────────────────────────── */

.cepha-appbar {
    display: flex;
    align-items: center;
    padding: 0 var(--cepha-space-lg);
    height: 56px;
    background: linear-gradient(135deg, var(--cepha-primary), var(--cepha-secondary));
    color: #fff;
    box-shadow: var(--cepha-shadow-md);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.cepha-appbar-title {
    font-size: 1.125rem;
    font-weight: 600;
    letter-spacing: -0.01em;
}

.cepha-appbar-spacer { flex: 1; }

.cepha-appbar-action {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: none;
    background: rgba(255, 255, 255, 0.15);
    color: #fff;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--cepha-transition);
    font-size: 1.25rem;
}

.cepha-appbar-action:hover { background: rgba(255, 255, 255, 0.25); }

/* ── Navigation Drawer ───────────────────────────────────────── */

.cepha-drawer {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    width: 280px;
    background: var(--cepha-surface-elevated);
    box-shadow: var(--cepha-shadow-xl);
    z-index: 1100;
    transform: translateX(-100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    overflow-y: auto;
}

.cepha-drawer.open { transform: translateX(0); }

.cepha-drawer-header {
    padding: var(--cepha-space-lg);
    background: linear-gradient(135deg, var(--cepha-primary), var(--cepha-secondary));
    color: #fff;
}

.cepha-drawer-item {
    display: flex;
    align-items: center;
    gap: var(--cepha-space-md);
    padding: 12px var(--cepha-space-lg);
    color: var(--cepha-text);
    text-decoration: none;
    transition: background var(--cepha-transition);
    border: none;
    background: transparent;
    width: 100%;
    font-size: 0.875rem;
    cursor: pointer;
}

.cepha-drawer-item:hover { background: var(--cepha-primary-alpha); }
.cepha-drawer-item.active {
    background: var(--cepha-primary-alpha);
    color: var(--cepha-primary);
    font-weight: 600;
}

.cepha-drawer-divider {
    height: 1px;
    background: var(--cepha-divider);
    margin: var(--cepha-space-sm) 0;
}

.cepha-drawer-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1099;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
}

.cepha-drawer-overlay.visible {
    opacity: 1;
    pointer-events: auto;
}

/* ── Chips / Badges ──────────────────────────────────────────── */

.cepha-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: var(--cepha-radius-full);
    background: var(--cepha-primary-alpha);
    color: var(--cepha-primary);
    white-space: nowrap;
}

.cepha-chip-success { background: rgba(72, 187, 120, 0.15); color: var(--cepha-success); }
.cepha-chip-danger  { background: rgba(245, 101, 101, 0.15); color: var(--cepha-danger); }
.cepha-chip-warning { background: rgba(237, 137, 54, 0.15); color: var(--cepha-warning); }

.cepha-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 20px;
    height: 20px;
    padding: 0 6px;
    font-size: 0.625rem;
    font-weight: 700;
    border-radius: 10px;
    background: var(--cepha-danger);
    color: #fff;
}

/* ── Tables ──────────────────────────────────────────────────── */

.cepha-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    font-size: 0.875rem;
}

.cepha-table th {
    padding: 12px 16px;
    text-align: left;
    font-weight: 600;
    color: var(--cepha-text-secondary);
    border-bottom: 2px solid var(--cepha-border);
    background: var(--cepha-surface);
    white-space: nowrap;
}

.cepha-table td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--cepha-divider);
    vertical-align: middle;
}

.cepha-table tr:hover td { background: var(--cepha-primary-alpha); }
.cepha-table tr:last-child td { border-bottom: none; }

/* ── Dialogs / Modals ────────────────────────────────────────── */

.cepha-dialog-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s;
}

.cepha-dialog-overlay.open {
    opacity: 1;
    pointer-events: auto;
}

.cepha-dialog {
    background: var(--cepha-surface-elevated);
    border-radius: var(--cepha-radius-xl);
    box-shadow: var(--cepha-shadow-xl);
    min-width: 360px;
    max-width: 560px;
    max-height: 85vh;
    overflow-y: auto;
    transform: scale(0.95) translateY(10px);
    transition: transform 0.2s;
}

.cepha-dialog-overlay.open .cepha-dialog {
    transform: scale(1) translateY(0);
}

.cepha-dialog-header {
    padding: var(--cepha-space-lg);
    border-bottom: 1px solid var(--cepha-divider);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.cepha-dialog-body { padding: var(--cepha-space-lg); }

.cepha-dialog-actions {
    padding: var(--cepha-space-md) var(--cepha-space-lg);
    border-top: 1px solid var(--cepha-divider);
    display: flex;
    justify-content: flex-end;
    gap: var(--cepha-space-sm);
}

/* ── Alerts / Snackbar ───────────────────────────────────────── */

.cepha-alert {
    display: flex;
    align-items: flex-start;
    gap: var(--cepha-space-md);
    padding: var(--cepha-space-md);
    border-radius: var(--cepha-radius);
    border-left: 4px solid;
    margin-bottom: var(--cepha-space-md);
}

.cepha-alert-info    { background: rgba(66, 153, 225, 0.1);  border-color: var(--cepha-info); }
.cepha-alert-success { background: rgba(72, 187, 120, 0.1);  border-color: var(--cepha-success); }
.cepha-alert-warning { background: rgba(237, 137, 54, 0.1);  border-color: var(--cepha-warning); }
.cepha-alert-danger  { background: rgba(245, 101, 101, 0.1); border-color: var(--cepha-danger); }

.cepha-snackbar {
    position: fixed;
    bottom: var(--cepha-space-lg);
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    padding: 12px 24px;
    background: var(--cepha-text);
    color: var(--cepha-bg);
    border-radius: var(--cepha-radius);
    box-shadow: var(--cepha-shadow-lg);
    font-size: 0.875rem;
    z-index: 3000;
    opacity: 0;
    transition: transform 0.3s, opacity 0.3s;
}

.cepha-snackbar.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

/* ── Progress / Loading ──────────────────────────────────────── */

.cepha-progress {
    height: 4px;
    background: var(--cepha-border);
    border-radius: 2px;
    overflow: hidden;
}

.cepha-progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--cepha-primary), var(--cepha-secondary));
    border-radius: 2px;
    transition: width 0.3s;
}

.cepha-progress-indeterminate .cepha-progress-bar {
    width: 40%;
    animation: cepha-progress-slide 1.5s ease-in-out infinite;
}

@keyframes cepha-progress-slide {
    0%   { transform: translateX(-100%); }
    100% { transform: translateX(350%); }
}

.cepha-spinner {
    width: 24px;
    height: 24px;
    border: 3px solid var(--cepha-border);
    border-top-color: var(--cepha-primary);
    border-radius: 50%;
    animation: cepha-spin 0.8s linear infinite;
}

@keyframes cepha-spin {
    to { transform: rotate(360deg); }
}

.cepha-skeleton {
    background: linear-gradient(90deg,
        var(--cepha-border) 25%,
        var(--cepha-divider) 50%,
        var(--cepha-border) 75%);
    background-size: 200% 100%;
    animation: cepha-shimmer 1.5s ease-in-out infinite;
    border-radius: var(--cepha-radius-sm);
}

@keyframes cepha-shimmer {
    0%   { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* ── Tooltips ────────────────────────────────────────────────── */

[data-cepha-tooltip] {
    position: relative;
}

[data-cepha-tooltip]::after {
    content: attr(data-cepha-tooltip);
    position: absolute;
    bottom: calc(100% + 6px);
    left: 50%;
    transform: translateX(-50%) scale(0.8);
    padding: 4px 8px;
    font-size: 0.7rem;
    background: var(--cepha-text);
    color: var(--cepha-bg);
    border-radius: var(--cepha-radius-sm);
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--cepha-transition-fast), transform var(--cepha-transition-fast);
    z-index: 999;
}

[data-cepha-tooltip]:hover::after {
    opacity: 1;
    transform: translateX(-50%) scale(1);
}

/* ── Avatars ─────────────────────────────────────────────────── */

.cepha-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.875rem;
    background: linear-gradient(135deg, var(--cepha-primary), var(--cepha-secondary));
    color: #fff;
    flex-shrink: 0;
}

.cepha-avatar-sm { width: 32px; height: 32px; font-size: 0.75rem; }
.cepha-avatar-lg { width: 56px; height: 56px; font-size: 1.25rem; }

/* ── Lists ───────────────────────────────────────────────────── */

.cepha-list { list-style: none; }

.cepha-list-item {
    display: flex;
    align-items: center;
    gap: var(--cepha-space-md);
    padding: 12px var(--cepha-space-md);
    border-bottom: 1px solid var(--cepha-divider);
    transition: background var(--cepha-transition);
}

.cepha-list-item:hover { background: var(--cepha-primary-alpha); }
.cepha-list-item:last-child { border-bottom: none; }

/* ── Switch / Toggle ─────────────────────────────────────────── */

.cepha-switch {
    position: relative;
    width: 44px;
    height: 24px;
    display: inline-block;
}

.cepha-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.cepha-switch-track {
    position: absolute;
    inset: 0;
    background: var(--cepha-border);
    border-radius: 12px;
    transition: background var(--cepha-transition);
    cursor: pointer;
}

.cepha-switch-track::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    left: 2px;
    top: 2px;
    background: #fff;
    border-radius: 50%;
    transition: transform var(--cepha-transition);
    box-shadow: var(--cepha-shadow-sm);
}

.cepha-switch input:checked + .cepha-switch-track {
    background: var(--cepha-primary);
}

.cepha-switch input:checked + .cepha-switch-track::after {
    transform: translateX(20px);
}

/* ── Tabs ────────────────────────────────────────────────────── */

.cepha-tabs {
    display: flex;
    border-bottom: 2px solid var(--cepha-divider);
    gap: var(--cepha-space-xs);
}

.cepha-tab {
    padding: 10px 16px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--cepha-text-secondary);
    border: none;
    background: transparent;
    cursor: pointer;
    position: relative;
    transition: color var(--cepha-transition);
}

.cepha-tab:hover { color: var(--cepha-text); }

.cepha-tab.active {
    color: var(--cepha-primary);
}

.cepha-tab.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--cepha-primary);
    border-radius: 1px 1px 0 0;
}

/* ── Security Status Indicator ───────────────────────────────── */

.cepha-security-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    border-radius: var(--cepha-radius-full);
    font-size: 0.625rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.cepha-security-badge.secure {
    background: rgba(72, 187, 120, 0.15);
    color: var(--cepha-success);
}

.cepha-security-badge.warning {
    background: rgba(237, 137, 54, 0.15);
    color: var(--cepha-warning);
}

.cepha-security-badge.breach {
    background: rgba(245, 101, 101, 0.15);
    color: var(--cepha-danger);
    animation: cepha-pulse 1s ease-in-out infinite;
}

@keyframes cepha-pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

.cepha-security-badge::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: currentColor;
}

/* ── Layout Utilities ────────────────────────────────────────── */

.cepha-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--cepha-space-lg);
}

.cepha-container-sm { max-width: 640px; }
.cepha-container-md { max-width: 768px; }

.cepha-flex { display: flex; }
.cepha-flex-col { display: flex; flex-direction: column; }
.cepha-items-center { align-items: center; }
.cepha-justify-between { justify-content: space-between; }
.cepha-justify-center { justify-content: center; }
.cepha-gap-sm { gap: var(--cepha-space-sm); }
.cepha-gap-md { gap: var(--cepha-space-md); }
.cepha-gap-lg { gap: var(--cepha-space-lg); }

.cepha-grid { display: grid; gap: var(--cepha-space-md); }
.cepha-grid-2 { grid-template-columns: repeat(2, 1fr); }
.cepha-grid-3 { grid-template-columns: repeat(3, 1fr); }

.cepha-mt-sm { margin-top: var(--cepha-space-sm); }
.cepha-mt-md { margin-top: var(--cepha-space-md); }
.cepha-mt-lg { margin-top: var(--cepha-space-lg); }
.cepha-mb-sm { margin-bottom: var(--cepha-space-sm); }
.cepha-mb-md { margin-bottom: var(--cepha-space-md); }
.cepha-mb-lg { margin-bottom: var(--cepha-space-lg); }
.cepha-p-md { padding: var(--cepha-space-md); }
.cepha-p-lg { padding: var(--cepha-space-lg); }

.cepha-text-center { text-align: center; }
.cepha-text-right { text-align: right; }
.cepha-w-full { width: 100%; }

/* ── Responsive ──────────────────────────────────────────────── */

@media (max-width: 768px) {
    .cepha-grid-2,
    .cepha-grid-3 {
        grid-template-columns: 1fr;
    }

    .cepha-dialog {
        min-width: auto;
        margin: var(--cepha-space-md);
        max-width: calc(100vw - 32px);
    }

    .cepha-appbar {
        padding: 0 var(--cepha-space-md);
    }
}

/* ── Animations ──────────────────────────────────────────────── */

.cepha-fade-in {
    animation: cepha-fadeIn 0.3s ease-out;
}

@keyframes cepha-fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
}

.cepha-slide-up {
    animation: cepha-slideUp 0.3s ease-out;
}

@keyframes cepha-slideUp {
    from { opacity: 0; transform: translateY(20px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ── Secure Form Layout (login/register) ─────────────────────── */

.cepha-auth-card {
    max-width: 420px;
    margin: var(--cepha-space-2xl) auto;
    padding: var(--cepha-space-2xl);
    background: var(--cepha-surface-elevated);
    border-radius: var(--cepha-radius-xl);
    box-shadow: var(--cepha-shadow-lg);
}

.cepha-auth-card .cepha-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--cepha-space-sm);
    margin-bottom: var(--cepha-space-xl);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--cepha-primary);
}

.cepha-auth-card cepha-secure-field {
    display: block;
    margin-bottom: var(--cepha-space-md);
}

.cepha-auth-card .cepha-input-group {
    margin-bottom: var(--cepha-space-md);
}

.cepha-auth-card form {
    display: flex;
    flex-direction: column;
}

.cepha-auth-card .cepha-alert {
    margin-bottom: var(--cepha-space-md);
}

/* ── Material Layout Overrides (cepha.css enhancement) ────────── */

.cepha-ui .cepha-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--cepha-space-xl);
    height: 64px;
    background: linear-gradient(135deg, var(--cepha-primary), var(--cepha-secondary));
    color: #fff;
    box-shadow: var(--cepha-shadow-md);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.cepha-ui .cepha-nav-brand a {
    color: #fff;
    font-size: 1.15rem;
    font-weight: 700;
    text-decoration: none;
    letter-spacing: 0.3px;
}

.cepha-ui .cepha-nav-links {
    display: flex;
    align-items: center;
    gap: var(--cepha-space-lg);
}

.cepha-ui .cepha-nav-links a {
    color: rgba(255, 255, 255, 0.85);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    padding: 6px 12px;
    border-radius: var(--cepha-radius);
    transition: all var(--cepha-transition);
}

.cepha-ui .cepha-nav-links a:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.12);
}

.cepha-ui .cepha-main {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--cepha-space-2xl) var(--cepha-space-xl);
    min-height: calc(100vh - 64px - 60px);
}

.cepha-ui .cepha-hero {
    text-align: center;
    padding: var(--cepha-space-2xl) 0;
    margin-bottom: var(--cepha-space-xl);
}

.cepha-ui .cepha-hero h1 {
    font-size: 2.75rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--cepha-primary), var(--cepha-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--cepha-space-md);
    letter-spacing: -0.5px;
}

.cepha-ui .cepha-hero .lead {
    font-size: 1.15rem;
    color: var(--cepha-text-secondary);
    margin-bottom: var(--cepha-space-sm);
}

.cepha-ui .cepha-hero .text-muted {
    font-size: 0.9rem;
    color: var(--cepha-text-secondary);
}

.cepha-ui .cepha-hero .text-muted strong {
    color: var(--cepha-primary);
    font-weight: 600;
}

.cepha-ui .cepha-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--cepha-space-lg);
    margin-top: var(--cepha-space-lg);
}

.cepha-ui .cepha-features .cepha-card {
    background: var(--cepha-surface-elevated);
    border: 1px solid var(--cepha-border);
    border-radius: var(--cepha-radius-lg);
    box-shadow: var(--cepha-shadow);
    transition: all var(--cepha-transition);
    overflow: hidden;
}

.cepha-ui .cepha-features .cepha-card:hover {
    box-shadow: var(--cepha-shadow-lg);
    transform: translateY(-4px);
    border-color: var(--cepha-primary-light);
}

.cepha-ui .cepha-features .cepha-card-body {
    padding: var(--cepha-space-xl);
}

.cepha-ui .cepha-features .cepha-card-body h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: var(--cepha-space-sm);
    color: var(--cepha-text);
}

.cepha-ui .cepha-features .cepha-card-body p {
    font-size: 0.9rem;
    color: var(--cepha-text-secondary);
    line-height: 1.6;
}

.cepha-ui .cepha-footer {
    text-align: center;
    padding: var(--cepha-space-lg) var(--cepha-space-xl);
    color: var(--cepha-text-secondary);
    font-size: 0.85rem;
    border-top: 1px solid var(--cepha-divider);
    background: var(--cepha-surface);
}

.cepha-ui .cepha-footer a {
    color: var(--cepha-primary);
    text-decoration: none;
    font-weight: 600;
}

.cepha-ui .cepha-footer a:hover {
    text-decoration: underline;
}

/* Auth button overrides for Material navbar */
.cepha-ui .cepha-nav .cepha-auth-btn-outline {
    color: rgba(255, 255, 255, 0.9);
    border-color: rgba(255, 255, 255, 0.4);
}

.cepha-ui .cepha-nav .cepha-auth-btn-outline:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.7);
}

.cepha-ui .cepha-nav .cepha-auth-btn-primary {
    background: rgba(255, 255, 255, 0.2);
    color: #fff;
    backdrop-filter: blur(4px);
}

.cepha-ui .cepha-nav .cepha-auth-btn-primary:hover {
    background: rgba(255, 255, 255, 0.3);
}

.cepha-ui .cepha-nav .cepha-auth-name {
    color: rgba(255, 255, 255, 0.9);
}

/* ── Responsive Material Layout ──────────────────────────────── */

@media (max-width: 768px) {
    .cepha-ui .cepha-nav {
        padding: 0 var(--cepha-space-md);
        height: 56px;
    }

    .cepha-ui .cepha-hero h1 {
        font-size: 1.8rem;
    }

    .cepha-ui .cepha-features {
        grid-template-columns: 1fr;
    }

    .cepha-ui .cepha-main {
        padding: var(--cepha-space-lg) var(--cepha-space-md);
    }
}

/* ── Print ───────────────────────────────────────────────────── */

@media print {
    .cepha-appbar,
    .cepha-drawer,
    .cepha-snackbar,
    .cepha-dialog-overlay {
        display: none !important;
    }
}