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

@font-face {
    font-family: 'Faruma';
    src: url('../fonts/Faruma.ttf') format('truetype');
    font-weight: normal;
    font-style: normal;
}

:root {
    --bg-main: #0b0f19;
    --bg-sidebar: rgba(17, 24, 39, 0.7);
    --bg-card: rgba(31, 41, 55, 0.4);
    --border-color: rgba(255, 255, 255, 0.08);
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --accent: #10b981; /* Emerald green */
    --accent-hover: #059669;
    --accent-glow: rgba(16, 185, 129, 0.15);
    --glass-blur: blur(12px);
    --user-bubble: #1f2937;
    --assistant-bubble: rgba(17, 24, 39, 0.5);
    --font-sans: 'Faruma', 'Inter', sans-serif;
    --font-heading: 'Faruma', 'Outfit', sans-serif;
    --transition-speed: 0.25s;
}

[data-theme="light"] {
    --bg-main: #f8fafc;
    --bg-sidebar: rgba(241, 245, 249, 0.8);
    --bg-card: rgba(255, 255, 255, 0.8);
    --border-color: rgba(0, 0, 0, 0.08);
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --user-bubble: #e2e8f0;
    --assistant-bubble: rgba(255, 255, 255, 0.8);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.1) transparent;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.25);
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-main);
    color: var(--text-primary);
    display: flex;
    height: 100vh;
    overflow: hidden;
}

/* Login Screen Overlay */
.auth-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: radial-gradient(circle at center, #111827 0%, #030712 100%);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    transition: opacity var(--transition-speed) ease;
}

.auth-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 40px;
    width: 100%;
    max-width: 420px;
    backdrop-filter: var(--glass-blur);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
    text-align: center;
    animation: fadeIn 0.5s ease-out;
}

.auth-logo {
    font-family: var(--font-heading);
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
    letter-spacing: -0.5px;
}

.auth-logo span {
    color: var(--accent);
    text-shadow: 0 0 15px var(--accent-glow);
}

.auth-subtitle {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 30px;
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.input-group {
    display: flex;
    flex-direction: column;
    text-align: left;
    gap: 6px;
}

.input-label {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
}

.auth-input {
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 14px 16px;
    border-radius: 12px;
    font-size: 1rem;
    outline: none;
    transition: border-color var(--transition-speed);
}

.auth-input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 10px var(--accent-glow);
}

.btn-primary {
    background-color: var(--accent);
    color: #ffffff;
    border: none;
    padding: 14px;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color var(--transition-speed), transform 0.1s;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
}

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

.btn-primary:active {
    transform: scale(0.98);
}

/* Layout App Container */
.app-container {
    display: flex;
    width: 100vw;
    height: 100vh;
}

/* Sidebar Styling */
.sidebar {
    width: 280px;
    background-color: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    backdrop-filter: var(--glass-blur);
    flex-shrink: 0;
    z-index: 10;
    transition: transform var(--transition-speed) ease;
}

.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
}

.btn-new-chat {
    width: 100%;
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 12px;
    border-radius: 10px;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color var(--transition-speed), border-color var(--transition-speed);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-new-chat:hover {
    background-color: rgba(255, 255, 255, 0.05);
    border-color: var(--text-secondary);
}

/* Chat Session History List */
.sidebar-content {
    flex: 1;
    overflow-y: auto;
    padding: 16px 10px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.chat-session-item {
    padding: 12px 14px;
    border-radius: 10px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: background-color var(--transition-speed);
    color: var(--text-secondary);
    font-size: 0.9rem;
    border: 1px solid transparent;
}

.chat-session-item:hover {
    background-color: rgba(255, 255, 255, 0.04);
    color: var(--text-primary);
}

.chat-session-item.active {
    background-color: var(--bg-card);
    border-color: var(--border-color);
    color: var(--text-primary);
}

.chat-title-wrapper {
    display: flex;
    align-items: center;
    gap: 10px;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
    flex: 1;
}

.chat-actions {
    display: flex;
    gap: 6px;
    opacity: 0;
    transition: opacity var(--transition-speed);
}

.chat-session-item:hover .chat-actions {
    opacity: 1;
}

.action-icon {
    cursor: pointer;
    opacity: 0.6;
    transition: opacity var(--transition-speed), color var(--transition-speed);
}

.action-icon:hover {
    opacity: 1;
    color: var(--accent);
}

.action-icon.delete:hover {
    color: #ef4444;
}

/* Sidebar Footer (Profile / Logout) */
.sidebar-footer {
    padding: 20px;
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 10px;
}

.profile-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background-color: var(--accent);
    color: white;
    display: flex;
    justify-content: center;
    align-items: center;
    font-weight: 600;
}

.profile-name {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-primary);
}

.btn-logout {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1.1rem;
    transition: color var(--transition-speed);
}

.btn-logout:hover {
    color: #ef4444;
}

/* Main Chat Window Panel */
.chat-window {
    flex: 1;
    display: flex;
    flex-direction: column;
    background-color: var(--bg-main);
    position: relative;
    min-height: 0;
}

.chat-header {
    height: 60px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    padding: 0 24px;
    justify-content: space-between;
}

.chat-current-title {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1.1rem;
}

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

.btn-theme {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1.2rem;
    cursor: pointer;
    transition: color var(--transition-speed);
}

.btn-theme:hover {
    color: var(--accent);
}

/* Chat Messages Container */
.messages-container {
    flex: 1;
    overflow-y: auto;
    min-height: 0;
    padding: 30px 0;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.message-row {
    width: 100%;
    display: flex;
    padding: 0 24px;
}

.message-row.user {
    justify-content: flex-end;
}

.message-row.assistant {
    justify-content: flex-start;
}

.message-bubble {
    max-width: 75%;
    padding: 16px 20px;
    border-radius: 18px;
    line-height: 1.6;
    font-size: 1.05rem;
    word-wrap: break-word;
    overflow-wrap: anywhere;
    position: relative;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.message-row.user .message-bubble {
    background-color: var(--user-bubble);
    border-bottom-right-radius: 4px;
    color: var(--text-primary);
}

.message-row.assistant .message-bubble {
    background-color: var(--assistant-bubble);
    border: 1px solid var(--border-color);
    border-bottom-left-radius: 4px;
    color: var(--text-primary);
}

/* RTL alignment specifically for Dhivehi text */
.rtl-text {
    direction: rtl;
    text-align: right;
    font-size: 1.1rem;
}

/* Feedback Actions under Assistant messages */
.feedback-actions {
    display: flex;
    gap: 12px;
    margin-top: 8px;
    opacity: 0.6;
    transition: opacity var(--transition-speed);
}

.message-bubble:hover .feedback-actions {
    opacity: 1;
}

.feedback-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 4px;
    transition: color var(--transition-speed), transform 0.1s;
}

.feedback-btn:hover {
    color: var(--text-primary);
}

.feedback-btn.active.up {
    color: var(--accent);
}

.feedback-btn.active.down {
    color: #ef4444;
}

.feedback-btn:active {
    transform: scale(0.9);
}

/* inline correction container */
.correction-container {
    margin-top: 12px;
    border-top: 1px solid var(--border-color);
    padding-top: 12px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    animation: slideDown 0.25s ease-out;
}

.correction-input {
    width: 100%;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 10px 12px;
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 0.95rem;
    resize: vertical;
    outline: none;
    transition: border-color var(--transition-speed);
}

.correction-input:focus {
    border-color: var(--accent);
}

.correction-submit-btn {
    align-self: flex-end;
    background-color: var(--accent);
    color: white;
    border: none;
    padding: 6px 14px;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color var(--transition-speed);
}

.correction-submit-btn:hover {
    background-color: var(--accent-hover);
}

/* Chat Input Bar area */
.input-area-container {
    padding: 0 24px 24px 24px;
    background: linear-gradient(180deg, transparent 0%, var(--bg-main) 30%);
}

.input-box-wrapper {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    backdrop-filter: var(--glass-blur);
    padding: 6px 12px;
    display: flex;
    align-items: center;
    transition: border-color var(--transition-speed);
}

.input-box-wrapper:focus-within {
    border-color: var(--accent);
    box-shadow: 0 0 15px var(--accent-glow);
}

.chat-textarea {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    padding: 12px 10px;
    font-size: 1rem;
    font-family: var(--font-sans);
    resize: none;
    max-height: 200px;
}

.chat-textarea::placeholder {
    color: var(--text-secondary);
}

.btn-record {
    background-color: transparent;
    color: var(--text-secondary);
    border: none;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    transition: all var(--transition-speed);
    margin-right: 8px;
    flex-shrink: 0;
    font-size: 1.1rem;
}

.btn-record:hover {
    color: var(--text-primary);
    background-color: rgba(255, 255, 255, 0.05);
}

.btn-record.recording {
    color: #ef4444;
    background-color: rgba(239, 68, 68, 0.15);
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0% { transform: scale(1); box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.4); }
    70% { transform: scale(1.1); box-shadow: 0 0 0 10px rgba(239, 68, 68, 0); }
    100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(239, 68, 68, 0); }
}

.btn-send {
    background-color: var(--accent);
    color: white;
    border: none;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    transition: background-color var(--transition-speed), transform 0.1s;
    margin-left: 8px;
    flex-shrink: 0;
}

.btn-send:hover {
    background-color: var(--accent-hover);
}

.btn-send:active {
    transform: scale(0.92);
}

.btn-send:disabled {
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--text-secondary);
    cursor: not-allowed;
}

/* Empty State / Welcome Screen styling */
.empty-state {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 40px;
}

.empty-state-icon {
    font-size: 4rem;
    color: var(--accent);
    margin-bottom: 20px;
    text-shadow: 0 0 20px var(--accent-glow);
}

.empty-state-title {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.empty-state-desc {
    color: var(--text-secondary);
    max-width: 480px;
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}

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

/* Responsive sidebars */
@media (max-width: 768px) {
    .sidebar {
        position: absolute;
        left: 0;
        top: 0;
        height: 100%;
        transform: translateX(-100%);
    }
    .sidebar.open {
        transform: translateX(0);
    }
}

/* Auth Buttons & Google OAuth Style */
.btn-google {
    background-color: #ffffff !important;
    color: #1f2937 !important;
    border: 1px solid var(--border-color);
    text-decoration: none;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    transition: background-color var(--transition-speed);
}

.btn-google:hover {
    background-color: #f3f4f6 !important;
    color: #111827 !important;
}

.divider {
    display: flex;
    align-items: center;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.8rem;
    margin: 20px 0;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

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

.divider:not(:empty)::before {
    margin-right: .8em;
}

.divider:not(:empty)::after {
    margin-left: .8em;
}

.btn-secondary-guest {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 12px;
    border-radius: 12px;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color var(--transition-speed), color var(--transition-speed);
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    width: 100%;
}

.btn-secondary-guest:hover {
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
}