/**
 * Island Koala SPA Styles
 */

/* ============================
   CSS Variables (Theme)
   ============================ */
:root {
    --ik-primary: #0073B9;
    --ik-primary-dark: #005a91;
    --ik-primary-light: #3399cc;
    --ik-secondary: #FCD213;
    --ik-background: #f9fafb;
    --ik-surface: #ffffff;
    --ik-text: #1f2937;
    --ik-text-muted: #6b7280;
    --ik-border: #e5e7eb;
    --ik-error: #ef4444;
    --ik-error-bg: #fef2f2;
    --ik-success: #10b981;
    --ik-success-bg: #ecfdf5;
    --ik-shadow: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
    --ik-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --ik-radius: 0.5rem;
    --ik-radius-lg: 1rem;
}

/* ============================
   Base Styles
   ============================ */
*, *::before, *::after {
    box-sizing: border-box;
}

.ik-spa-body {
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--ik-background);
    color: var(--ik-text);
    min-height: 100vh;
}

#ik-app {
    min-height: 100vh;
}

.ik-app-container {
    min-height: 100vh;
}

/* ============================
   Promo Banner (SPA)
   ============================ */
.ik-promo-banner-spa {
    background: linear-gradient(135deg, #FF6B35, #FF8C42);
    color: white;
    padding: 0.75rem 1rem;
    text-align: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    font-size: 0.9375rem;
    font-weight: 500;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.ik-promo-banner-spa .ik-promo-icon {
    font-size: 1.125rem;
    margin-right: 0.5rem;
}

.ik-promo-banner-spa strong {
    background: rgba(255, 255, 255, 0.25);
    padding: 0.125rem 0.5rem;
    border-radius: 0.25rem;
    font-family: 'Courier New', monospace;
    letter-spacing: 0.05em;
}

@media (max-width: 480px) {
    .ik-promo-banner-spa {
        font-size: 0.875rem;
        padding: 0.625rem 0.75rem;
    }
}

/* ============================
   Loading State
   ============================ */
.ik-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    gap: 1rem;
    color: var(--ik-text-muted);
}

.ik-loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--ik-border);
    border-top-color: var(--ik-primary);
    border-radius: 50%;
    animation: ik-spin 0.8s linear infinite;
}

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

/* ============================
   Offline Banner
   ============================ */
.ik-offline-banner {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--ik-error);
    color: white;
    padding: 0.75rem 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    z-index: 9999;
}

.ik-offline-banner i {
    opacity: 0.8;
}

/* ============================
   Auth Pages (Login/Signup)
   ============================ */
.ik-auth-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    background: linear-gradient(135deg, #0073B9 0%, #005a91 100%);
}

.ik-auth-container {
    width: 100%;
    max-width: 400px;
    background: var(--ik-surface);
    border-radius: var(--ik-radius-lg);
    box-shadow: var(--ik-shadow-lg);
    padding: 2rem;
}

.ik-auth-header {
    text-align: center;
    margin-bottom: 2rem;
}

.ik-logo {
    font-size: 3rem;
    margin-bottom: 0.5rem;
}

.ik-auth-header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--ik-text);
    margin: 0 0 0.5rem 0;
}

.ik-auth-header p {
    color: var(--ik-text-muted);
    margin: 0;
    font-size: 0.875rem;
}

/* ============================
   Form Styles
   ============================ */
.ik-auth-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.ik-form-group {
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
}

.ik-form-group label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--ik-text);
}

.ik-form-group input {
    padding: 0.75rem 1rem;
    border: 1px solid var(--ik-border);
    border-radius: var(--ik-radius);
    font-size: 1rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.ik-form-group input:focus {
    outline: none;
    border-color: var(--ik-primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.ik-form-group input::placeholder {
    color: var(--ik-text-muted);
}

/* ============================
   Buttons
   ============================ */
.ik-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: var(--ik-radius);
    cursor: pointer;
    transition: all 0.2s;
}

.ik-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

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

.ik-btn-primary:hover:not(:disabled) {
    background: var(--ik-primary-dark);
}

.ik-btn-premium {
    background: linear-gradient(135deg, #FFD700 0%, #FFA500 100%);
    color: #1a1a1a;
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(255, 215, 0, 0.3);
}

.ik-btn-premium:hover:not(:disabled) {
    background: linear-gradient(135deg, #FFC700 0%, #FF9500 100%);
    box-shadow: 0 4px 12px rgba(255, 215, 0, 0.4);
    transform: translateY(-1px);
}

.ik-btn-outline {
    background: transparent;
    color: var(--ik-primary);
    border: 1px solid var(--ik-border);
}

.ik-btn-outline:hover:not(:disabled) {
    background: var(--ik-background);
}

/* ============================
   Spinner
   ============================ */
.ik-spinner {
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: ik-spin 0.8s linear infinite;
    display: inline-block;
}

/* ============================
   Alerts
   ============================ */
.ik-alert {
    padding: 0.75rem 1rem;
    border-radius: var(--ik-radius);
    font-size: 0.875rem;
}

.ik-alert-error {
    background: var(--ik-error-bg);
    color: var(--ik-error);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.ik-alert-success {
    background: var(--ik-success-bg);
    color: var(--ik-success);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

/* ============================
   Email Verification States
   ============================ */
.ik-verification-sent {
    text-align: center;
    padding: 1.5rem 0;
}

.ik-verification-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.ik-verification-message {
    font-size: 1rem;
    color: var(--ik-text);
    margin-bottom: 0.5rem;
}

.ik-verification-hint {
    font-size: 0.875rem;
    color: var(--ik-text-muted);
    margin-bottom: 1.5rem;
}

.ik-divider {
    display: flex;
    align-items: center;
    text-align: center;
    margin: 1rem 0;
    color: var(--ik-text-muted);
    font-size: 0.875rem;
}

.ik-divider::before,
.ik-divider::after {
    content: '';
    flex: 1;
    border-bottom: 1px solid var(--ik-border);
}

.ik-divider span {
    padding: 0 0.75rem;
}

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

.ik-btn-secondary:hover:not(:disabled) {
    background: rgba(0, 115, 185, 0.1);
}

.ik-btn-full {
    width: 100%;
}

/* ============================
   Auth Footer
   ============================ */
.ik-auth-footer {
    text-align: center;
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--ik-border);
}

.ik-auth-footer p {
    margin: 0;
    font-size: 0.875rem;
    color: var(--ik-text-muted);
}

.ik-auth-footer a {
    color: var(--ik-primary);
    text-decoration: none;
    font-weight: 500;
}

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

/* ============================
   Home Page
   ============================ */
.ik-home-page {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.ik-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.5rem;
    background: var(--ik-surface);
    border-bottom: 1px solid var(--ik-border);
    box-shadow: var(--ik-shadow);
}

.ik-header-logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--ik-text);
}

.ik-header-user {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 0.875rem;
    color: var(--ik-text-muted);
}

.ik-header-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Hamburger menu - hidden on desktop */
.ik-menu-toggle {
    display: none;
}

.ik-mobile-menu {
    display: none;
}

.ik-menu-overlay {
    display: none;
}

.ik-main {
    flex: 1;
    padding: 2rem 1.5rem;
    max-width: 800px;
    margin: 0 auto;
    width: 100%;
}

.ik-welcome-card {
    background: var(--ik-surface);
    border-radius: var(--ik-radius-lg);
    padding: 2rem;
    text-align: center;
    box-shadow: var(--ik-shadow);
    margin-bottom: 2rem;
}

.ik-welcome-card h1 {
    font-size: 1.5rem;
    margin: 0 0 0.5rem 0;
    color: var(--ik-text);
}

.ik-welcome-card p {
    margin: 0;
    color: var(--ik-text-muted);
}

/* ============================
   Features Preview
   ============================ */
.ik-features-preview {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

.ik-feature-card {
    background: var(--ik-surface);
    border-radius: var(--ik-radius-lg);
    padding: 1.5rem;
    text-align: center;
    box-shadow: var(--ik-shadow);
    position: relative;
}

.ik-feature-card.ik-coming-soon {
    opacity: 0.7;
}

.ik-feature-icon {
    font-size: 2.5rem;
    margin-bottom: 0.75rem;
}

.ik-feature-card h3 {
    font-size: 1.125rem;
    margin: 0 0 0.5rem 0;
    color: var(--ik-text);
}

.ik-feature-card p {
    margin: 0;
    font-size: 0.875rem;
    color: var(--ik-text-muted);
}

.ik-badge {
    display: inline-block;
    background: var(--ik-secondary);
    color: #333;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.25rem 0.5rem;
    border-radius: 9999px;
    margin-top: 0.75rem;
}

.ik-badge-new {
    background: var(--ik-primary);
    color: white;
}

/* ============================
   Clickable Feature Card
   ============================ */
.ik-feature-card.ik-clickable {
    cursor: pointer;
    opacity: 1;
    transition: transform 0.2s, box-shadow 0.2s;
}

.ik-feature-card.ik-clickable:hover {
    transform: translateY(-4px);
    box-shadow: var(--ik-shadow-lg);
}

.ik-feature-card-large {
    width: 100%;
}

.ik-feature-badges {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
    margin-top: 0.75rem;
}

.ik-feature-badges span {
    background: rgba(0, 115, 185, 0.1);
    color: var(--ik-primary);
    padding: 0.25rem 0.75rem;
    border-radius: var(--ik-radius);
    font-size: 0.875rem;
    font-weight: 500;
}

/* ============================
   Chat Setup Page
   ============================ */
.ik-chat-setup-page {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.ik-setup-main {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.ik-setup-card {
    background: var(--ik-surface);
    border-radius: var(--ik-radius-lg);
    box-shadow: var(--ik-shadow-lg);
    padding: 2rem;
    width: 100%;
    max-width: 500px;
}

.ik-setup-header {
    text-align: center;
    margin-bottom: 2rem;
}

.ik-setup-header h1 {
    font-size: 1.5rem;
    color: var(--ik-text);
    margin: 0 0 0.5rem 0;
}

.ik-setup-header p {
    color: var(--ik-text-muted);
    margin: 0;
}

.ik-setup-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.ik-select {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    border: 1px solid var(--ik-border);
    border-radius: var(--ik-radius);
    background: var(--ik-surface);
    color: var(--ik-text);
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236b7280' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
}

.ik-select:focus {
    outline: none;
    border-color: var(--ik-primary);
    box-shadow: 0 0 0 3px rgba(0, 115, 185, 0.15);
}

.ik-difficulty-options {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.ik-difficulty-option {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    border: 2px solid var(--ik-border);
    border-radius: var(--ik-radius);
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s;
}

.ik-difficulty-option:hover {
    border-color: var(--ik-primary-light);
}

.ik-difficulty-option.ik-selected {
    border-color: var(--ik-primary);
    background: rgba(0, 115, 185, 0.05);
}

.ik-difficulty-option input[type="radio"] {
    display: none;
}

.ik-difficulty-code {
    font-weight: 700;
    font-size: 1rem;
    color: var(--ik-primary);
    min-width: 2rem;
}

.ik-difficulty-name {
    color: var(--ik-text-muted);
    font-size: 0.9rem;
}

.ik-btn-large {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

.ik-btn-icon {
    background: transparent;
    border: none;
    color: var(--ik-text);
    cursor: pointer;
    font-size: 1rem;
    padding: 0.5rem;
}

.ik-btn-icon:hover {
    color: var(--ik-primary);
}

.ik-loading-inline {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 2rem;
    color: var(--ik-text-muted);
}

/* ============================
   Chat Interface Page
   ============================ */
.ik-chat-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: #e5e7eb;
    padding: 1rem;
}

.ik-chat-container {
    display: flex;
    flex-direction: column;
    height: calc(100vh - 2rem);
    max-width: 800px;
    width: 100%;
    background: var(--ik-surface);
    border-radius: var(--ik-radius-lg);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1), 0 4px 10px rgba(0, 0, 0, 0.05);
    overflow: hidden;
}

.ik-chat-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--ik-border);
    gap: 1rem;
    flex-shrink: 0;
}

.ik-chat-header-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.ik-btn-translit {
    font-weight: 700;
    font-size: 0.75rem;
    padding: 0.375rem 0.625rem;
    border: 1px solid var(--ik-border);
    border-radius: var(--ik-radius);
    background: transparent;
    transition: all 0.2s;
}

.ik-btn-translit:hover {
    background: var(--ik-background);
}

.ik-btn-translit.ik-active {
    background: var(--ik-primary);
    color: white;
    border-color: var(--ik-primary);
}

.ik-chat-info {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.125rem;
}

.ik-chat-tutor {
    font-weight: 600;
    color: var(--ik-text);
}

.ik-chat-meta {
    font-size: 0.75rem;
    color: var(--ik-text-muted);
}

.ik-btn-small {
    padding: 0.375rem 0.75rem;
    font-size: 0.875rem;
}

/* Chat Messages */
.ik-chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    background: var(--ik-surface);
}

.ik-message {
    max-width: 75%;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.ik-message-assistant {
    display: flex;
    flex-direction: row;
    align-items: flex-start;
    gap: 0.75rem;
}

.ik-message-column {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    flex: 1;
    min-width: 0;
}

.ik-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.ik-message-wrapper {
    display: flex;
    align-items: flex-end;
    gap: 0.5rem;
}

.ik-message-content {
    padding: 1rem 1.25rem;
    border-radius: var(--ik-radius-lg);
    line-height: 1.6;
    white-space: pre-wrap;
    word-wrap: break-word;
    font-size: 1.0625rem;
}

.ik-message-user {
    align-self: flex-end;
}

.ik-message-user .ik-message-wrapper {
    flex-direction: row-reverse;
}

.ik-message-user .ik-message-content {
    background: var(--ik-primary);
    color: white;
    border-bottom-right-radius: 0.25rem;
}

.ik-message-feedback {
    margin-top: 0.5rem;
    padding: 0.75rem 1rem;
    background: rgba(16, 185, 129, 0.08);
    border-left: 3px solid var(--ik-success);
    border-radius: var(--ik-radius);
    font-size: 0.9375rem;
    color: var(--ik-text);
    line-height: 1.5;
    max-width: 100%;
}

.ik-message-transliteration {
    margin-top: 0.5rem;
    padding: 0.5rem 0.75rem;
    background: rgba(0, 115, 185, 0.05);
    border-radius: var(--ik-radius);
    font-size: 0.875rem;
    color: var(--ik-text-muted);
    line-height: 1.5;
    font-style: italic;
    font-family: 'Courier New', Consolas, monospace;
}

.ik-message-assistant {
    align-self: flex-start;
}

.ik-message-assistant .ik-message-content {
    background: var(--ik-surface);
    color: var(--ik-text);
    border: 1px solid var(--ik-border);
    border-bottom-left-radius: 0.25rem;
}

.ik-message-actions {
    display: flex;
    gap: 0.25rem;
    align-items: center;
}

.ik-btn-action {
    background: transparent;
    border: 1px solid var(--ik-border);
    border-radius: 50%;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 0.875rem;
    transition: all 0.2s;
}

.ik-btn-action:hover:not(:disabled) {
    background: var(--ik-background);
    border-color: var(--ik-primary);
    transform: scale(1.1);
}

.ik-btn-action:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.ik-btn-action.ik-active {
    background: var(--ik-primary);
    color: white;
    border-color: var(--ik-primary);
}

.ik-btn-audio {
    background: transparent;
    border: 1px solid var(--ik-border);
    border-radius: 50%;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 0.875rem;
    transition: background 0.2s;
}

.ik-btn-audio:hover:not(:disabled) {
    background: var(--ik-background);
}

.ik-btn-audio:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Typing Indicator */
.ik-message-typing .ik-typing-indicator {
    display: flex;
    gap: 0.25rem;
    padding: 0.5rem;
}

.ik-typing-indicator span {
    width: 8px;
    height: 8px;
    background: var(--ik-text-muted);
    border-radius: 50%;
    animation: typing 1.4s infinite ease-in-out both;
}

.ik-typing-indicator span:nth-child(1) { animation-delay: -0.32s; }
.ik-typing-indicator span:nth-child(2) { animation-delay: -0.16s; }

@keyframes typing {
    0%, 80%, 100% {
        transform: scale(0.8);
        opacity: 0.5;
    }
    40% {
        transform: scale(1);
        opacity: 1;
    }
}

/* Clickable Words in AI Messages */
.ik-word {
    cursor: pointer;
    padding: 0.125rem 0.25rem;
    margin: 0 -0.25rem;
    border-radius: 4px;
    transition: background-color 0.2s;
    display: inline-block;
}

.ik-word:hover {
    background-color: rgba(0, 115, 185, 0.15);
}

.ik-word:active {
    background-color: rgba(0, 115, 185, 0.25);
}

/* Translation Popup */
.ik-translation-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.1);
    z-index: 2000;
    display: flex;
    align-items: flex-start;
    justify-content: center;
}

.ik-translation-popup {
    position: fixed;
    transform: translate(-50%, -100%) translateY(-12px);
    background: var(--ik-surface);
    border: 1px solid var(--ik-border);
    border-radius: var(--ik-radius);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    padding: 0.75rem 1rem;
    min-width: 200px;
    max-width: 300px;
    z-index: 2001;
}

.ik-translation-word {
    font-weight: 700;
    color: var(--ik-primary);
    font-size: 1rem;
    margin-bottom: 0.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--ik-border);
}

.ik-translation-content {
    color: var(--ik-text);
    font-size: 0.9rem;
    line-height: 1.4;
    white-space: pre-wrap;
}

.ik-translation-close {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    background: transparent;
    border: none;
    color: var(--ik-text-muted);
    cursor: pointer;
    font-size: 1.25rem;
    line-height: 1;
    padding: 0;
    width: 1.5rem;
    height: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.ik-translation-close:hover {
    background: var(--ik-background);
    color: var(--ik-text);
}

/* Chat Input */
.ik-chat-input-container {
    display: flex;
    gap: 0.5rem;
    padding: 1rem 1.5rem;
    background: var(--ik-surface);
    border-top: 1px solid var(--ik-border);
    flex-shrink: 0;
}

.ik-chat-input-wrapper {
    flex: 1;
    position: relative;
    display: flex;
    align-items: center;
    border: 1px solid var(--ik-border);
    border-radius: var(--ik-radius-lg);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.ik-chat-input-wrapper:focus-within {
    border-color: var(--ik-primary);
    box-shadow: 0 0 0 3px rgba(0, 115, 185, 0.15);
}

.ik-btn-mic {
    background: transparent;
    border: 1px solid var(--ik-border);
    border-radius: var(--ik-radius-lg);
    padding: 0.75rem;
    font-size: 1.25rem;
    cursor: pointer;
    transition: all 0.2s;
    min-width: 48px;
}

.ik-btn-mic:hover:not(:disabled) {
    background: var(--ik-background);
    border-color: var(--ik-primary);
}

.ik-btn-mic:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.ik-btn-mic.ik-recording {
    background: #dc3545;
    border-color: #dc3545;
    color: white;
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
}

.ik-chat-input {
    flex: 1;
    padding: 0.75rem 1rem;
    padding-right: 5.5rem;
    padding-bottom: 1.75rem;
    border: none;
    border-radius: var(--ik-radius-lg);
    font-size: 1rem;
    outline: none;
    width: 100%;
    resize: none;
    overflow-y: auto;
    min-height: 48px;
    max-height: 150px;
    font-family: inherit;
    line-height: 1.5;
    background: transparent;
}

.ik-chat-input:disabled {
    background: var(--ik-background);
    cursor: not-allowed;
}

.ik-char-counter {
    position: absolute;
    bottom: 0.375rem;
    left: 1rem;
    font-size: 0.75rem;
    color: var(--ik-text-muted);
    pointer-events: none;
}

.ik-char-limit-near {
    color: #ff9800;
}

.ik-char-limit-reached {
    color: #dc3545;
    font-weight: 600;
}

.ik-btn-send {
    position: absolute;
    right: 0.375rem;
    top: 50%;
    transform: translateY(-50%);
    padding: 0.5rem 1rem;
    white-space: nowrap;
    flex-shrink: 0;
    border-radius: var(--ik-radius);
    height: auto;
}

.ik-spinner-small {
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

/* Chat Error */
.ik-chat-error {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1rem;
    background: var(--ik-error-bg);
    color: var(--ik-error);
    font-size: 0.875rem;
    border-top: 1px solid var(--ik-error);
}

.ik-chat-error button {
    background: transparent;
    border: none;
    color: var(--ik-error);
    font-size: 1.25rem;
    cursor: pointer;
    padding: 0;
    line-height: 1;
}

/* Chat Info Message */
.ik-chat-info-message {
    display: flex;
    align-items: center;
    padding: 0.75rem 1rem;
    background: #e7f3ff;
    color: #0073B9;
    font-size: 0.875rem;
    border-top: 1px solid #b3d9ff;
}

/* ============================
   Alert Modal (Bootstrap-style)
   ============================ */
.ik-alert-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.75);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    padding: 1rem;
    animation: ik-fade-in 0.2s ease;
}

@keyframes ik-fade-in {
    from { opacity: 0; }
    to { opacity: 1; }
}

.ik-alert-modal {
    background: var(--ik-surface);
    border-radius: var(--ik-radius-lg);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.2), 0 10px 10px -5px rgba(0, 0, 0, 0.1);
    max-width: 480px;
    width: 100%;
    animation: ik-alert-slide-up 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    overflow: hidden;
}

@keyframes ik-alert-slide-up {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.96);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.ik-alert-upgrade {
    border-top: 4px solid var(--ik-primary);
}

.ik-alert-header {
    background: linear-gradient(135deg, rgba(0, 115, 185, 0.1), rgba(0, 115, 185, 0.05));
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    position: relative;
}

.ik-alert-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.ik-alert-header h3 {
    margin: 0;
    font-size: 1.375rem;
    color: var(--ik-text);
    font-weight: 700;
    flex: 1;
}

.ik-alert-close {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    background: transparent;
    border: none;
    font-size: 1.75rem;
    color: var(--ik-text-muted);
    cursor: pointer;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.2s;
    line-height: 1;
}

.ik-alert-close:hover {
    background: rgba(0, 0, 0, 0.1);
    color: var(--ik-text);
    transform: rotate(90deg);
}

.ik-alert-body {
    padding: 1.5rem;
}

.ik-alert-message {
    margin: 0 0 1.5rem;
    font-size: 1rem;
    line-height: 1.6;
    color: var(--ik-text);
}

.ik-alert-message strong {
    color: var(--ik-text);
    font-weight: 600;
}

.ik-alert-price {
    background: linear-gradient(135deg, var(--ik-primary), var(--ik-primary-dark));
    color: white;
    padding: 1.25rem;
    border-radius: var(--ik-radius);
    text-align: center;
}

.ik-price-big {
    display: block;
    font-size: 3rem;
    font-weight: 800;
    line-height: 1;
    margin-bottom: 0.5rem;
}

.ik-price-text {
    display: block;
    font-size: 0.9375rem;
    opacity: 0.95;
    font-weight: 500;
}

.ik-alert-actions {
    padding: 0 1.5rem 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.ik-alert-actions .ik-btn {
    width: 100%;
}

.ik-btn-text {
    background: transparent;
    color: var(--ik-text-muted);
    border: none;
    padding: 0.75rem;
    font-size: 0.9375rem;
}

.ik-btn-text:hover {
    background: var(--ik-background);
    color: var(--ik-text);
}

/* ============================
   Pricing Page
   ============================ */
.ik-pricing-page {
    min-height: 100vh;
    background: var(--ik-background);
}

.ik-pricing-main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

.ik-pricing-hero {
    text-align: center;
    padding: 3rem 1rem;
    background: linear-gradient(135deg, var(--ik-primary-light), var(--ik-primary));
    border-radius: var(--ik-radius-lg);
    color: white;
    margin-bottom: 3rem;
}

.ik-pricing-hero h1 {
    font-size: 2.5rem;
    margin: 0 0 0.5rem;
}

.ik-pricing-hero > p {
    font-size: 1.125rem;
    margin-bottom: 2rem;
    opacity: 0.95;
}

.ik-pricing-price {
    margin-bottom: 2rem;
}

.ik-price-amount {
    font-size: 4rem;
    font-weight: 700;
    display: block;
}

.ik-price-period {
    font-size: 1rem;
    opacity: 0.9;
}

.ik-pricing-comparison {
    background: var(--ik-surface);
    border-radius: var(--ik-radius-lg);
    padding: 2.5rem;
    margin-bottom: 3rem;
    box-shadow: var(--ik-shadow);
}

.ik-pricing-comparison h2 {
    text-align: center;
    margin: 0 0 0.75rem;
    font-size: 2rem;
    color: var(--ik-text);
}

.ik-comparison-intro {
    text-align: center;
    color: var(--ik-text-muted);
    margin-bottom: 2rem;
}

.ik-pricing-table {
    overflow-x: auto;
    margin-bottom: 1.5rem;
}

.ik-pricing-table table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9375rem;
}

.ik-pricing-table th,
.ik-pricing-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--ik-border);
}

.ik-pricing-table th {
    font-weight: 600;
    color: var(--ik-text);
    background: var(--ik-background);
}

.ik-pricing-table td {
    color: var(--ik-text-muted);
}

.ik-highlight-row {
    background: rgba(0, 115, 185, 0.05);
}

.ik-highlight-row td {
    color: var(--ik-text);
    font-weight: 500;
}

.ik-pricing-savings {
    text-align: center;
    padding: 1rem;
    background: var(--ik-success-bg);
    border-radius: var(--ik-radius);
    color: var(--ik-success);
    font-size: 1.125rem;
}

.ik-pricing-savings strong {
    font-weight: 700;
}

.ik-pricing-features {
    background: var(--ik-surface);
    border-radius: var(--ik-radius-lg);
    padding: 2.5rem;
    margin-bottom: 3rem;
    box-shadow: var(--ik-shadow);
}

.ik-pricing-features h2 {
    text-align: center;
    margin: 0 0 2rem;
    font-size: 2rem;
    color: var(--ik-text);
}

.ik-features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.ik-feature-item {
    text-align: center;
}

.ik-feature-icon {
    font-size: 2.5rem;
    margin-bottom: 0.75rem;
}

.ik-feature-item h3 {
    margin: 0 0 0.5rem;
    font-size: 1.125rem;
    color: var(--ik-text);
}

.ik-feature-item p {
    margin: 0;
    color: var(--ik-text-muted);
    font-size: 0.9375rem;
    line-height: 1.6;
}

.ik-pricing-cta {
    text-align: center;
    padding: 3rem 1rem;
    background: linear-gradient(135deg, var(--ik-primary-light), var(--ik-primary));
    border-radius: var(--ik-radius-lg);
    color: white;
}

.ik-pricing-cta h2 {
    font-size: 2rem;
    margin: 0 0 0.5rem;
}

.ik-pricing-cta p {
    font-size: 1.125rem;
    margin-bottom: 2rem;
    opacity: 0.95;
}

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

.ik-pricing-cta .ik-btn-primary:hover {
    background: var(--ik-background);
}

/* ============================
   Responsive
   ============================ */
@media (max-width: 480px) {
    .ik-auth-container {
        padding: 1.5rem;
    }
    
    .ik-auth-header h1 {
        font-size: 1.25rem;
    }
    
    .ik-header {
        padding: 0.75rem 1rem;
    }
    
    .ik-header-user span {
        display: none;
    }
    
    .ik-header-user .ik-btn-outline {
        display: none;
    }
    
    /* Hamburger menu */
    .ik-menu-toggle {
        display: block;
        background: none;
        border: none;
        font-size: 1.5rem;
        cursor: pointer;
        padding: 0.25rem;
        color: var(--ik-text);
    }
    
    .ik-mobile-menu {
        display: block;
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 300px;
        height: 100vh;
        background: var(--ik-surface);
        box-shadow: -2px 0 10px rgba(0, 0, 0, 0.1);
        transition: right 0.3s ease;
        z-index: 1000;
        padding: 1rem;
    }
    
    .ik-mobile-menu.ik-open {
        right: 0;
    }
    
    .ik-menu-overlay {
        display: block;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        background: rgba(0, 0, 0, 0.5);
        z-index: 999;
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.3s ease;
    }
    
    .ik-menu-overlay.ik-open {
        opacity: 1;
        pointer-events: auto;
    }
    
    .ik-mobile-menu-header {
        display: flex;
        justify-content: space-between;
        align-items: center;
        margin-bottom: 1.5rem;
        padding-bottom: 1rem;
        border-bottom: 1px solid var(--ik-border);
    }
    
    .ik-mobile-menu-close {
        background: none;
        border: none;
        font-size: 1.5rem;
        cursor: pointer;
        color: var(--ik-text);
        padding: 0.25rem;
    }
    
    .ik-mobile-menu-items {
        display: flex;
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .ik-mobile-menu-item {
        padding: 0.75rem;
        background: var(--ik-background);
        border-radius: var(--ik-radius);
        color: var(--ik-text);
        text-align: left;
        border: none;
        cursor: pointer;
        font-size: 1rem;
        width: 100%;
    }
    
    .ik-main {
        padding: 1rem;
        box-sizing: border-box;
        max-width: 100%;
        overflow-x: hidden;
    }
    
    .ik-welcome-card {
        padding: 1.5rem;
        margin-left: 0;
        margin-right: 0;
        box-sizing: border-box;
        max-width: 100%;
    }
    
    .ik-welcome-card h1 {
        font-size: 1.25rem;
    }
    
    .ik-features-preview {
        margin-left: 0;
        margin-right: 0;
        box-sizing: border-box;
        max-width: 100%;
    }
    
    .ik-feature-card {
        margin-left: 0;
        margin-right: 0;
        box-sizing: border-box;
        max-width: 100%;
    }
    
    .ik-setup-card {
        padding: 1.5rem;
    }
    
    .ik-select {
        font-size: 1.125rem;
        padding: 1rem;
    }
    
    .ik-select option {
        font-size: 1.125rem;
    }
    
    .ik-message {
        max-width: 90%;
    }
    
    /* Mobile: Stack avatar above message */
    .ik-message-assistant {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
    
    .ik-avatar {
        align-self: flex-start;
    }
    
    /* Mobile: Stack actions below message */
    .ik-message-wrapper {
        flex-direction: column;
        align-items: flex-start;
        width: 100%;
    }
    
    .ik-message-actions {
        align-self: flex-end;
        margin-top: 0.5rem;
    }
    
    .ik-chat-header {
        padding: 0.5rem 0.75rem;
    }
    
    .ik-chat-header-actions > .ik-btn {
        display: none;
    }
    
    /* Show hamburger menu on mobile */
    .ik-chat-header .ik-menu-toggle {
        display: block;
    }
    
    /* Move send button inside input on mobile */
    .ik-chat-input-container {
        padding: 0.75rem;
        gap: 0.5rem;
    }
    
    .ik-chat-input-wrapper {
        position: relative;
        flex: 1;
    }
    
    .ik-chat-input {
        padding-right: 70px;
        padding-bottom: 0.75rem; /* Reduced padding since counter is hidden */
        min-height: 44px;
        max-height: 120px; /* Smaller max height on mobile */
    }
    
    .ik-char-counter {
        display: none; /* Hide character counter on mobile to avoid overlap */
    }
    
    .ik-btn-send {
        position: absolute;
        right: 4px;
        top: 4px;
        transform: none;
        padding: 0.5rem 0.75rem;
        font-size: 0.875rem;
        height: auto;
        border-radius: var(--ik-radius);
    }
    
    .ik-modal-content {
        padding: 1.5rem;
    }
    
    .ik-modal-icon {
        font-size: 2.5rem;
    }
    
    .ik-price-value {
        font-size: 2rem;
    }
    
    .ik-pricing-hero {
        padding: 2rem 1rem;
    }
    
    .ik-pricing-hero h1 {
        font-size: 1.75rem;
    }
    
    .ik-price-amount {
        font-size: 3rem;
    }
    
    .ik-pricing-comparison,
    .ik-pricing-features {
        padding: 1.5rem;
    }
    
    .ik-features-grid {
        grid-template-columns: 1fr;
    }
    
    .ik-pricing-cta {
        padding: 2rem 1rem;
    }
}

/* ============================
   Vocabulary Page
   ============================ */
.ik-vocab-page {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.ik-vocab-main {
    flex: 1;
    padding: 2rem 1.5rem;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

.ik-vocab-filters {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    width: 100%;
    margin-bottom: 1rem;
}

.ik-vocab-header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.ik-vocab-search {
    flex: 1;
    min-width: 200px;
    max-width: 400px;
}

.ik-vocab-search input,
.ik-vocab-filter-select {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--ik-border);
    border-radius: var(--ik-radius);
    font-size: 1rem;
    background: var(--ik-surface);
}

.ik-vocab-actions {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.ik-card {
    background: var(--ik-surface);
    border-radius: var(--ik-radius-lg);
    padding: 1.5rem;
    box-shadow: var(--ik-shadow);
}

.ik-vocab-table {
    width: 100%;
    border-collapse: collapse;
}

.ik-vocab-table th, .ik-vocab-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--ik-border);
}

.ik-vocab-table th {
    font-weight: 600;
    color: var(--ik-text-muted);
}

.ik-vocab-table th:last-child,
.ik-vocab-table td:last-child {
    width: 120px;
}

.ik-vocab-table tbody tr:last-child td {
    border-bottom: none;
}

.ik-vocab-cell-lang {
    font-size: 1.5rem;
}

.ik-vocab-cell-word {
    font-weight: 700;
}

.ik-vocab-cell-translation {
    color: var(--ik-primary);
}

.ik-vocab-cell-context {
    color: #555;
    font-style: italic;
}

.ik-vocab-cell-date {
    color: #777;
    font-size: 0.9em;
}

.ik-vocab-context {
    max-width: 260px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.ik-vocab-empty {
    color: #aaa;
}

.ik-vocab-export-pill {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 44px;
    padding: 0.2rem 0.6rem;
    border-radius: 999px;
    border: 1px solid var(--ik-border);
    background: var(--ik-background);
    color: var(--ik-text-muted);
    font-size: 0.8rem;
    font-weight: 600;
}

.ik-vocab-export-pill-on {
    border-color: rgba(45, 80, 22, 0.3);
    background: rgba(45, 80, 22, 0.12);
    color: var(--ik-primary);
}

.ik-empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--ik-text-muted);
}

.ik-pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--ik-border);
}

@media (max-width: 768px) {
    .ik-vocab-main {
        padding: 1rem;
    }

    .ik-card {
        padding: 1rem;
    }

    .ik-vocab-filters {
        gap: 0.75rem;
    }

    .ik-vocab-search {
        min-width: 100%;
        max-width: none;
    }

    .ik-vocab-header-container {
        margin-top: 0;
        margin-bottom: 1rem;
    }

    .ik-vocab-actions {
        width: 100%;
        justify-content: space-between;
        flex-wrap: wrap;
    }

    .ik-vocab-actions .ik-btn {
        width: 100%;
    }

    .ik-vocab-table thead {
        display: none;
    }

    .ik-vocab-table,
    .ik-vocab-table tbody,
    .ik-vocab-table tr,
    .ik-vocab-table td {
        display: block;
        width: 100%;
    }

    .ik-vocab-table tbody tr {
        margin-bottom: 0.75rem;
        padding: 0.75rem;
        border: 1px solid var(--ik-border);
        border-radius: var(--ik-radius);
        background: var(--ik-background);
    }

    .ik-vocab-table tbody tr:last-child {
        margin-bottom: 0;
    }

    .ik-vocab-table td {
        display: grid;
        grid-template-columns: 92px 1fr;
        gap: 0.5rem;
        padding: 0.35rem 0;
        border-bottom: none;
    }

    .ik-vocab-table td::before {
        content: attr(data-label);
        color: var(--ik-text-muted);
        font-size: 0.75rem;
        font-weight: 600;
        letter-spacing: 0.04em;
        text-transform: uppercase;
    }

    .ik-vocab-cell-lang {
        font-size: 1.25rem;
    }

    .ik-vocab-cell-context {
        font-style: normal;
    }

    .ik-vocab-context {
        max-width: none;
        white-space: normal;
        overflow: visible;
        text-overflow: unset;
    }

    .ik-pagination {
        flex-wrap: wrap;
        gap: 0.75rem;
    }
}