/* Base Variables & Reset */
:root {
    --bg-color: #f0f4f8;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --primary-color: #3b82f6;
    --primary-hover: #2563eb;
    --accent-color: #f59e0b;
    --card-bg: #ffffff;
    --border-color: #e2e8f0;
    
    --bot-msg-bg: #f1f5f9;
    --bot-msg-text: #1e293b;
    --user-msg-bg: #3b82f6;
    --user-msg-text: #ffffff;
    
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-full: 9999px;
}

[data-theme="dark"] {
    --bg-color: #0f172a;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --card-bg: #1e293b;
    --border-color: #334155;
    
    --bot-msg-bg: #334155;
    --bot-msg-text: #f8fafc;
    --user-msg-bg: #6366f1;
    
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.3);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: background-color 0.3s ease;
}

/* App Container */
.app-container {
    width: 100%;
    max-width: 480px;
    height: 95vh;
    background-color: var(--card-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
    border: 1px solid var(--border-color);
}

/* Header – glassmorphism */
.app-header {
    padding: 1rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: 10;
}

[data-theme="dark"] .app-header {
    background: rgba(30, 41, 59, 0.75);
}

.header-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

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

/* Custom Native Language Dropdown */
.custom-translate-dropdown {
    background-color: var(--card-bg);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 0.4rem 0.75rem;
    font-family: 'Inter', sans-serif;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml;charset=US-ASCII,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22292.4%22%20height%3D%22292.4%22%3E%3Cpath%20fill%3D%22%2364748b%22%20d%3D%22M287%2069.4a17.6%2017.6%200%200%200-13-5.4H18.4c-5%200-9.3%201.8-12.9%205.4A17.6%2017.6%200%200%200%200%2082.2c0%205%201.8%209.3%205.4%2012.9l128%20127.9c3.6%203.6%207.8%205.4%2012.8%205.4s9.2-1.8%2012.8-5.4L287%2095c3.5-3.5%205.4-7.8%205.4-12.8%200-5-1.9-9.2-5.5-12.8z%22%2F%3E%3C%2Fsvg%3E");
    background-repeat: no-repeat;
    background-position: right 0.7rem top 50%;
    background-size: 0.65rem auto;
    padding-right: 2rem;
}

[data-theme="dark"] .custom-translate-dropdown {
    background-image: url("data:image/svg+xml;charset=US-ASCII,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22292.4%22%20height%3D%22292.4%22%3E%3Cpath%20fill%3D%22%2394a3b8%22%20d%3D%22M287%2069.4a17.6%2017.6%200%200%200-13-5.4H18.4c-5%200-9.3%201.8-12.9%205.4A17.6%2017.6%200%200%200%200%2082.2c0%205%201.8%209.3%205.4%2012.9l128%20127.9c3.6%203.6%207.8%205.4%2012.8%205.4s9.2-1.8%2012.8-5.4L287%2095c3.5-3.5%205.4-7.8%205.4-12.8%200-5-1.9-9.2-5.5-12.8z%22%2F%3E%3C%2Fsvg%3E");
}

.custom-translate-dropdown:hover {
    border-color: var(--primary-color);
}

.custom-translate-dropdown:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
}

.custom-translate-dropdown option {
    background-color: var(--card-bg);
    color: var(--text-primary);
}

/* Hide Google's Default Top Banner */
.skiptranslate iframe {
    visibility: hidden !important;
    display: none !important;
}
body {
    top: 0 !important;
}

.header-title i {
    font-size: 2rem;
    color: var(--primary-color);
}

.header-title h1 {
    font-size: 1.125rem;
    font-weight: 700;
}

.header-title p {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.icon-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    transition: color 0.2s, transform 0.2s;
    border-radius: var(--radius-full);
    padding: 0.5rem;
}

.icon-btn:hover {
    color: var(--primary-color);
    transform: scale(1.1);
    background-color: var(--bot-msg-bg);
}

/* Dashboard */
.dashboard {
    padding: 1rem 1.5rem;
    background-color: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
}

.progress-header {
    display: flex;
    justify-content: space-between;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.progress-percent {
    color: var(--primary-color);
}

.progress-bar-container {
    height: 8px;
    background-color: var(--border-color);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    width: 0%;
    background-color: var(--primary-color);
    border-radius: var(--radius-full);
    transition: width 0.5s ease-out;
}

/* Google Charts Gauge */
.gauge-container {
    display: flex;
    justify-content: center;
    animation: fadeIn 0.3s ease-out;
}

/* Custom Scrollbar for Chat Messages */
.chat-messages::-webkit-scrollbar {
    width: 6px;
}
.chat-messages::-webkit-scrollbar-track {
    background: transparent;
}
.chat-messages::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: var(--radius-full);
}
.chat-messages::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* Journey Tracker */
.journey-tracker {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.5rem;
    background-color: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
}

.step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    opacity: 0.5;
    transition: all 0.3s;
}

.step.active {
    opacity: 1;
}

.step.completed {
    opacity: 1;
    color: var(--success);
}

.step-icon {
    width: 2rem;
    height: 2rem;
    border-radius: var(--radius-full);
    background-color: var(--bot-msg-bg);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.125rem;
}

.step.active .step-icon {
    background-color: var(--primary-color);
    color: white;
}

.step.completed .step-icon {
    background-color: var(--success);
    color: white;
}

.step-label {
    font-size: 0.65rem;
    font-weight: 600;
    text-transform: uppercase;
}

.step-line {
    flex-grow: 1;
    height: 2px;
    background-color: var(--border-color);
    margin: 0 0.5rem 1.25rem 0.5rem;
}

.step.completed + .step-line {
    background-color: var(--success);
}

/* Chat Interface */
.chat-container {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background-color: var(--bg-color);
}

.chat-messages {
    flex-grow: 1;
    padding: 1.5rem;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.message {
    max-width: 85%;
    padding: 0.875rem 1rem;
    border-radius: var(--radius-lg);
    font-size: 0.9375rem;
    line-height: 1.4;
    animation: fadeIn 0.3s ease-out;
    box-shadow: 0 1px 3px rgb(0 0 0 / 0.06);
}

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

.bot-message {
    align-self: flex-start;
    background-color: var(--bot-msg-bg);
    color: var(--bot-msg-text);
    border-bottom-left-radius: 0.25rem;
}

.user-message {
    align-self: flex-end;
    background-color: var(--user-msg-bg);
    color: var(--user-msg-text);
    border-bottom-right-radius: 0.25rem;
}

/* Actionable Links inside Chat Bubbles */
.action-btn {
    display: inline-block;
    margin-top: 0.75rem;
    padding: 0.5rem 1rem;
    background-color: var(--card-bg);
    color: var(--primary-color);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: 1px solid var(--primary-color);
    transition: all 0.2s ease;
    text-align: center;
}

.action-btn:hover {
    background-color: var(--primary-color);
    color: #fff;
}

[data-theme="dark"] .action-btn {
    background-color: var(--card-bg);
    color: var(--primary-color);
}

[data-theme="dark"] .action-btn:hover {
    background-color: var(--primary-color);
    color: #fff;
}

/* Input Area */
.chat-input-area {
    padding: 1rem;
    background-color: var(--card-bg);
    border-top: 1px solid var(--border-color);
}

.quick-replies {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-bottom: 0.75rem;
}

.quick-reply-btn {
    padding: 0.5rem 1rem;
    background-color: var(--bot-msg-bg);
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

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

.chat-form {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

#user-input {
    flex-grow: 1;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.9375rem;
    transition: border-color 0.2s;
}

#user-input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.send-btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius-full);
    width: 2.75rem;
    height: 2.75rem;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.25rem;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.2s;
}

.send-btn:hover {
    background-color: var(--primary-hover);
    transform: scale(1.05);
}

/* Alerts */
#alert-container {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 100;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.alert {
    padding: 1rem 1.5rem;
    border-radius: var(--radius-md);
    color: white;
    font-weight: 600;
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    animation: slideInRight 0.3s ease-out;
}

.alert.success { background-color: var(--success); }
.alert.warning { background-color: var(--warning); }
.alert.danger { background-color: var(--danger); }
.alert.info { background-color: var(--primary-color); }

@keyframes slideInRight {
    from { opacity: 0; transform: translateX(100%); }
    to { opacity: 1; transform: translateX(0); }
}

.fade-out {
    opacity: 0;
    transform: translateX(100%);
    transition: all 0.3s ease-in;
}

/* Header Actions */
.header-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Status Badge */
.status-badge {
    font-size: 0.7rem;
    font-weight: 700;
    padding: 0.3rem 0.75rem;
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.03em;
    white-space: nowrap;
    transition: all 0.3s ease;
}

.status-badge:empty {
    display: none;
}

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

.badge-warning {
    background-color: var(--warning);
    color: #fff;
}

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

/* Typing Indicator */
.typing-indicator {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.875rem 1.25rem;
    min-height: 2.5rem;
}

.typing-indicator .dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--text-secondary);
    animation: typingBounce 1.2s infinite ease-in-out;
}

.typing-indicator .dot:nth-child(2) {
    animation-delay: 0.15s;
}

.typing-indicator .dot:nth-child(3) {
    animation-delay: 0.3s;
}

@keyframes typingBounce {
    0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
    30% { transform: translateY(-6px); opacity: 1; }
}

/* Footer */
.app-footer {
    padding: 0.5rem 1rem;
    text-align: center;
    font-size: 0.65rem;
    color: var(--text-secondary);
    border-top: 1px solid var(--border-color);
    background-color: var(--card-bg);
    letter-spacing: 0.02em;
    flex-shrink: 0;
}

/* Responsive */
@media (max-width: 480px) {
    .app-container {
        height: 100vh;
        border-radius: 0;
        border: none;
    }
}