/* 
   ePaper Central Onboarding Design System
   Clean Material UI Theme - Indigo & White Palette
*/

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

:root {
    /* Pure Indigo & White Palette */
    --md-indigo-50: #eef2ff;
    --md-indigo-100: #e0e7ff;
    --md-indigo-200: #c7d2fe;
    --md-indigo-500: #6366f1;
    --md-indigo-600: #4f46e5;
    --md-indigo-700: #4338ca;
    --md-indigo-800: #3730a3;
    --md-indigo-900: #312e81;

    --bg-page: #f8fafc;
    --bg-surface: #ffffff;
    --bg-surface-hover: #f1f5f9;
    --bg-subtle: #f8fafc;

    --border-color: #e2e8f0;
    --border-focus: var(--md-indigo-600);
    
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    
    --font-family: 'Roboto', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-pill: 50px;

    /* Material Elevation Shadows */
    --elevation-1: 0 1px 3px rgba(0, 0, 0, 0.05), 0 1px 2px rgba(0, 0, 0, 0.03);
    --elevation-2: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --elevation-3: 0 10px 15px -3px rgba(0, 0, 0, 0.06), 0 4px 6px -2px rgba(0, 0, 0, 0.03);
    --elevation-4: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 10px 10px -5px rgba(0, 0, 0, 0.02);

    --transition-material: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-page);
    color: var(--text-primary);
    line-height: 1.5;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

/* Container Layout */
.container {
    max-width: 1140px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

/* Material Header Navbar */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.75rem;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--elevation-2);
    margin-bottom: 2.5rem;
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    text-decoration: none;
}

.brand-icon {
    width: 40px;
    height: 40px;
    background: var(--md-indigo-600);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.2rem;
    color: #ffffff;
    box-shadow: 0 2px 8px rgba(79, 70, 229, 0.3);
}

.brand-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

.brand-title span {
    color: var(--md-indigo-600);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.5rem 0.85rem;
    border-radius: var(--radius-sm);
    transition: var(--transition-material);
}

.nav-link:hover, .nav-link.active {
    color: var(--md-indigo-600);
    background: var(--md-indigo-50);
}

.badge-security {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 0.9rem;
    background: var(--md-indigo-50);
    border: 1px solid var(--md-indigo-200);
    border-radius: var(--radius-pill);
    color: var(--md-indigo-700);
    font-size: 0.825rem;
    font-weight: 600;
}

/* Material Stepper Navigator */
.stepper-wrapper {
    margin-bottom: 2.5rem;
}

.stepper {
    display: flex;
    justify-content: space-between;
    position: relative;
    max-width: 760px;
    margin: 0 auto;
}

.stepper::before {
    content: '';
    position: absolute;
    top: 20px;
    left: 40px;
    right: 40px;
    height: 2px;
    background: var(--border-color);
    z-index: 1;
}

.stepper-progress {
    position: absolute;
    top: 20px;
    left: 40px;
    height: 2px;
    background: var(--md-indigo-600);
    z-index: 1;
    transition: width 0.35s ease;
    width: 0%;
}

.step-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    z-index: 2;
}

.step-circle {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: var(--bg-surface);
    border: 2px solid var(--border-color);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.95rem;
    transition: var(--transition-material);
}

.step-item.active .step-circle {
    border-color: var(--md-indigo-600);
    background: var(--md-indigo-600);
    color: #ffffff;
    box-shadow: 0 0 0 4px var(--md-indigo-100);
}

.step-item.completed .step-circle {
    border-color: var(--md-indigo-700);
    background: var(--md-indigo-700);
    color: #ffffff;
}

.step-label {
    margin-top: 0.5rem;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
}

.step-item.active .step-label {
    color: var(--md-indigo-700);
}

/* Material Hero Section */
.hero {
    text-align: center;
    margin-bottom: 2.5rem;
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    letter-spacing: -0.02em;
}

.hero-title span {
    color: var(--md-indigo-600);
}

.hero-subtitle {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 650px;
    margin: 0 auto;
}

/* Material Card Panel */
.panel {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    box-shadow: var(--elevation-3);
    margin-bottom: 2rem;
    display: none;
    animation: materialFade 0.3s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.panel.active {
    display: block;
}

@keyframes materialFade {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.panel-title {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.35rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.panel-description {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 2rem;
}

/* Clean Material Plans Grid */
.plans-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
    gap: 1.25rem;
    margin-bottom: 2rem;
}

.plan-card {
    background: var(--bg-surface);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    cursor: pointer;
    transition: var(--transition-material);
    position: relative;
    box-shadow: var(--elevation-1);
}

.plan-card:hover {
    border-color: var(--md-indigo-200);
    box-shadow: var(--elevation-2);
    transform: translateY(-2px);
}

.plan-card.selected {
    border-color: var(--md-indigo-600);
    background: var(--md-indigo-50);
    box-shadow: 0 0 0 2px var(--md-indigo-600);
}

.plan-badge {
    position: absolute;
    top: 12px;
    right: 12px;
    padding: 0.2rem 0.6rem;
    background: var(--md-indigo-600);
    border-radius: var(--radius-pill);
    font-size: 0.7rem;
    font-weight: 700;
    color: #ffffff;
    text-transform: uppercase;
}

.plan-name {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.35rem;
}

.plan-price {
    font-size: 1.85rem;
    font-weight: 800;
    color: var(--md-indigo-700);
    margin-bottom: 1rem;
}

.plan-price span {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.plan-features {
    list-style: none;
    margin-top: 1rem;
    border-top: 1px solid var(--border-color);
    padding-top: 1rem;
}

.plan-features li {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.4rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.plan-features li::before {
    content: '✓';
    color: var(--md-indigo-600);
    font-weight: bold;
}

/* Material Forms & Outline Inputs */
.form-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.form-group.full-width {
    grid-column: span 2;
}

.form-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
}

.form-control {
    background: var(--bg-surface);
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 0.75rem 1rem;
    color: var(--text-primary);
    font-size: 0.95rem;
    font-family: inherit;
    transition: var(--transition-material);
    width: 100%;
}

.form-control:focus {
    outline: none;
    border-color: var(--md-indigo-600);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}

.form-hint {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.status-indicator {
    font-size: 0.85rem;
    font-weight: 600;
    margin-top: 0.25rem;
}

.status-indicator.available {
    color: var(--md-indigo-700);
}

.status-indicator.taken {
    color: #dc2626;
}

/* Material Buttons */
.btn-group {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.8rem 1.6rem;
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-material);
    border: none;
    text-decoration: none;
}

.btn-primary {
    background: var(--md-indigo-600);
    color: #ffffff;
    box-shadow: 0 2px 6px rgba(79, 70, 229, 0.3);
}

.btn-primary:hover {
    background: var(--md-indigo-700);
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.4);
}

.btn-secondary {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.btn-secondary:hover {
    background: var(--bg-subtle);
    color: var(--text-primary);
    border-color: var(--text-muted);
}

.btn-emerald {
    background: var(--md-indigo-700);
    color: #ffffff;
    box-shadow: 0 2px 6px rgba(67, 56, 202, 0.3);
}

.btn-emerald:hover {
    background: var(--md-indigo-800);
}

/* Material Security & OTP Card */
.security-box {
    background: var(--bg-subtle);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.cf-turnstile {
    min-height: 65px;
    margin-top: 0.75rem;
}

.otp-digits {
    display: flex;
    gap: 0.5rem;
    margin: 1rem 0;
}

.otp-digit-input {
    width: 48px;
    height: 54px;
    text-align: center;
    font-size: 1.4rem;
    font-weight: 700;
    border-radius: var(--radius-md);
    background: var(--bg-surface);
    border: 1.5px solid var(--border-color);
    color: var(--md-indigo-700);
}

.otp-digit-input:focus {
    border-color: var(--md-indigo-600);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
    outline: none;
}

/* Dev Sandbox Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 23, 42, 0.5);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: var(--transition-material);
}

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

.modal-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2rem;
    max-width: 420px;
    width: 90%;
    box-shadow: var(--elevation-4);
    text-align: center;
}

.modal-otp-display {
    font-size: 2.5rem;
    font-weight: 900;
    letter-spacing: 0.25em;
    color: var(--md-indigo-700);
    background: var(--md-indigo-50);
    border: 1px dashed var(--md-indigo-200);
    border-radius: var(--radius-md);
    padding: 0.85rem;
    margin: 1.25rem 0;
}

/* Receipt Card */
.receipt-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    text-align: center;
    box-shadow: var(--elevation-3);
}

.receipt-icon {
    width: 64px;
    height: 64px;
    background: var(--md-indigo-50);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.25rem auto;
    font-size: 2rem;
    color: var(--md-indigo-600);
}

.receipt-table {
    width: 100%;
    margin: 1.5rem 0;
    border-collapse: collapse;
    text-align: left;
}

.receipt-table th, .receipt-table td {
    padding: 0.8rem 1rem;
    border-bottom: 1px solid var(--border-color);
}

.receipt-table th {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.9rem;
}

.receipt-table td {
    font-weight: 600;
    color: var(--text-primary);
}

/* Material Data Table */
.data-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

.data-table th, .data-table td {
    padding: 0.9rem 1.1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.data-table th {
    background: var(--bg-subtle);
    color: var(--text-secondary);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    font-weight: 700;
}

.data-table tr:hover {
    background: var(--bg-subtle);
}

.badge-mode {
    padding: 0.25rem 0.6rem;
    border-radius: var(--radius-pill);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
}

.badge-mode.pdfjs {
    background: var(--md-indigo-50);
    color: var(--md-indigo-700);
    border: 1px solid var(--md-indigo-200);
}

.badge-mode.localserver {
    background: #f1f5f9;
    color: #334155;
    border: 1px solid #cbd5e1;
}

/* Footer */
.footer {
    text-align: center;
    padding: 2.5rem 0;
    color: var(--text-muted);
    font-size: 0.9rem;
    border-top: 1px solid var(--border-color);
    margin-top: 3.5rem;
}

.footer a {
    color: var(--md-indigo-600);
    text-decoration: none;
    font-weight: 500;
}

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

@media (max-width: 768px) {
    .form-grid {
        grid-template-columns: 1fr;
    }
    .hero-title {
        font-size: 1.85rem;
    }
    .btn-group {
        flex-direction: column-reverse;
        gap: 1rem;
    }
    .btn {
        width: 100%;
    }
}