/**
 * Telegram Setup Wizard Styles
 * Mobile-first responsive design
 */

/* ============================================================================
   CSS Variables & Reset
   ============================================================================ */

:root {
    /* Colors */
    --color-primary: #0088cc;
    --color-primary-dark: #006699;
    --color-secondary: #6c757d;
    --color-success: #28a745;
    --color-danger: #dc3545;
    --color-warning: #ffc107;
    --color-info: #17a2b8;

    /* Grays */
    --color-bg: #f5f7fa;
    --color-white: #ffffff;
    --color-gray-100: #f8f9fa;
    --color-gray-200: #e9ecef;
    --color-gray-300: #dee2e6;
    --color-gray-600: #6c757d;
    --color-gray-800: #343a40;
    --color-gray-900: #212529;

    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-size-base: 16px;
    --line-height-base: 1.6;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;

    /* Border */
    --border-radius: 8px;
    --border-radius-lg: 12px;

    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);

    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 300ms ease-in-out;
}

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

/* ============================================================================
   Base Styles
   ============================================================================ */

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
    color: var(--color-gray-900);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm);
}

/* ============================================================================
   Container & Card
   ============================================================================ */

.container {
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
}

.wizard-card {
    background: var(--color-white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-lg);
    position: relative;
    overflow: hidden;
}

/* ============================================================================
   Progress Indicator
   ============================================================================ */

.progress-container {
    margin-bottom: var(--spacing-lg);
}

.progress-bar {
    width: 100%;
    height: 6px;
    background: var(--color-gray-200);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: var(--spacing-xs);
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary), var(--color-primary-dark));
    border-radius: 3px;
    transition: width var(--transition-base);
    width: 33.33%;
}

.progress-text {
    font-size: 0.875rem;
    color: var(--color-gray-600);
    text-align: center;
}

/* ============================================================================
   Step Styles
   ============================================================================ */

.step {
    animation: fadeIn var(--transition-base);
}

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

.step-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.step-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-sm);
    animation: bounce 1s ease-in-out;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.success-icon {
    color: var(--color-success);
}

.step-header h1 {
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-xs);
}

.step-content {
    /* Content spacing handled by children */
}

.step-description {
    font-size: 1rem;
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.intro-text {
    font-size: 1.125rem;
    color: var(--color-gray-600);
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.success-message {
    font-size: 1.25rem;
    color: var(--color-success);
    text-align: center;
    margin-bottom: var(--spacing-md);
    font-weight: 500;
}

.settings-note {
    font-size: 0.875rem;
    color: var(--color-gray-600);
    text-align: center;
    margin-top: var(--spacing-md);
}

/* ============================================================================
   Info Boxes
   ============================================================================ */

.info-box {
    background: var(--color-gray-100);
    border-left: 4px solid var(--color-info);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-md);
}

.info-box.success {
    border-left-color: var(--color-success);
    background: #d4edda;
}

.info-box.warning {
    border-left-color: var(--color-warning);
    background: #fff3cd;
}

.info-box h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--color-gray-900);
}

.info-box p {
    font-size: 0.875rem;
    color: var(--color-gray-800);
    margin-bottom: var(--spacing-xs);
}

.info-box p:last-child {
    margin-bottom: 0;
}

.info-box ul {
    list-style: none;
    margin-bottom: var(--spacing-sm);
}

.info-box ul li {
    padding-left: 1.5rem;
    position: relative;
    margin-bottom: var(--spacing-xs);
    color: var(--color-gray-800);
}

.info-box ul li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--color-success);
    font-weight: bold;
}

.time-estimate {
    font-size: 0.875rem;
    color: var(--color-gray-600);
    font-style: italic;
}

/* ============================================================================
   Forms
   ============================================================================ */

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
    color: var(--color-gray-800);
}

.form-input {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    border: 2px solid var(--color-gray-300);
    border-radius: var(--border-radius);
    transition: all var(--transition-fast);
    font-family: var(--font-family);
}

.form-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 136, 204, 0.1);
}

.form-input.error {
    border-color: var(--color-danger);
}

.form-input.error:focus {
    box-shadow: 0 0 0 3px rgba(220, 53, 69, 0.1);
}

.code-input {
    font-size: 1.5rem;
    letter-spacing: 0.5rem;
    text-align: center;
    font-family: monospace;
}

.form-help {
    font-size: 0.875rem;
    color: var(--color-gray-600);
    margin-top: var(--spacing-xs);
}

.form-error {
    font-size: 0.875rem;
    color: var(--color-danger);
    margin-top: var(--spacing-xs);
    display: none;
}

.form-error:not(:empty) {
    display: block;
}

/* ============================================================================
   Buttons
   ============================================================================ */

.button-group {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

.btn {
    flex: 1;
    padding: 0.875rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: var(--font-family);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-primary {
    background: var(--color-primary);
    color: var(--color-white);
}

.btn-primary:hover:not(:disabled) {
    background: var(--color-primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-primary:active:not(:disabled) {
    transform: translateY(0);
}

.btn-secondary {
    background: var(--color-gray-200);
    color: var(--color-gray-800);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--color-gray-300);
}

.btn-link {
    background: none;
    border: none;
    color: var(--color-primary);
    text-decoration: underline;
    cursor: pointer;
    font-size: 0.875rem;
    padding: 0;
}

.btn-link:hover:not(:disabled) {
    color: var(--color-primary-dark);
}

.btn-link:disabled {
    color: var(--color-gray-600);
    text-decoration: none;
}

.btn-spinner {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* ============================================================================
   Resend Container
   ============================================================================ */

.resend-container {
    text-align: center;
    margin: var(--spacing-md) 0;
    padding: var(--spacing-md);
    background: var(--color-gray-100);
    border-radius: var(--border-radius);
}

.resend-container p {
    font-size: 0.875rem;
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-xs);
}

/* ============================================================================
   Channel List
   ============================================================================ */

.channel-list {
    list-style: none;
    margin-top: var(--spacing-sm);
}

.channel-list li {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--color-white);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
    color: var(--color-gray-800);
}

.channel-list li::before {
    content: "📢 ";
    margin-right: var(--spacing-xs);
}

/* ============================================================================
   Error Display
   ============================================================================ */

.global-error {
    position: fixed;
    top: var(--spacing-md);
    left: 50%;
    transform: translateX(-50%);
    max-width: 500px;
    width: calc(100% - 2rem);
    background: var(--color-white);
    border-left: 4px solid var(--color-danger);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-md);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    z-index: 1000;
    animation: slideDown var(--transition-base);
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translate(-50%, -20px);
    }
    to {
        opacity: 1;
        transform: translate(-50%, 0);
    }
}

.global-error.success {
    border-left-color: var(--color-success);
}

.error-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.error-content {
    flex: 1;
}

.error-content strong {
    display: block;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--color-gray-900);
}

.error-content p {
    font-size: 0.875rem;
    color: var(--color-gray-800);
    margin: 0;
}

.error-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--color-gray-600);
    padding: 0;
    width: 1.5rem;
    height: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.error-close:hover {
    color: var(--color-gray-900);
}

/* ============================================================================
   Loading Overlay
   ============================================================================ */

.loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.95);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 100;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--color-gray-200);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.loading-overlay p {
    margin-top: var(--spacing-md);
    color: var(--color-gray-600);
    font-weight: 500;
}

/* ============================================================================
   Skip Link
   ============================================================================ */

.skip-link {
    text-align: center;
    margin-top: var(--spacing-lg);
}

.skip-link a {
    color: var(--color-gray-600);
    text-decoration: none;
    font-size: 0.875rem;
}

.skip-link a:hover {
    color: var(--color-primary);
    text-decoration: underline;
}

/* ============================================================================
   Footer
   ============================================================================ */

.wizard-footer {
    text-align: center;
    margin-top: var(--spacing-md);
    color: var(--color-white);
}

.wizard-footer p {
    font-size: 0.875rem;
    opacity: 0.9;
}

.wizard-footer a {
    color: var(--color-white);
    text-decoration: underline;
}

.wizard-footer a:hover {
    opacity: 0.8;
}

/* ============================================================================
   Responsive Design
   ============================================================================ */

/* Tablets and up */
@media (min-width: 768px) {
    .wizard-card {
        padding: var(--spacing-xl);
    }

    .step-header h1 {
        font-size: 2rem;
    }

    .step-icon {
        font-size: 5rem;
    }
}

/* Desktop and up */
@media (min-width: 1024px) {
    body {
        padding: var(--spacing-lg);
    }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* High contrast mode */
@media (prefers-contrast: high) {
    .btn-primary {
        border: 2px solid var(--color-white);
    }

    .form-input:focus {
        outline: 2px solid var(--color-primary);
    }
}

/* Dark mode support (optional) */
@media (prefers-color-scheme: dark) {
    /* Can add dark mode styles here if desired */
}