/* ==========================================================================
   Base & Variables
   ========================================================================== */
:root {
    /* Color Palette - Premium Dark Theme Base */
    --bg-color: #0b0f19;
    --bg-secondary: #131a2a;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    
    /* Accents (Gold & Cyan for Legal Tech feel) */
    --accent-primary: #d4af37; /* Gold */
    --accent-primary-glow: rgba(212, 175, 55, 0.4);
    --accent-secondary: #0ea5e9; /* Cyan */
    
    /* UI Elements */
    --glass-bg: rgba(19, 26, 42, 0.7);
    --glass-border: rgba(255, 255, 255, 0.08);
    --bot-msg-bg: rgba(30, 41, 59, 0.7);
    --user-msg-bg: rgba(212, 175, 55, 0.15);
    
    /* Typography */
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    /* Layout */
    --radius-lg: 24px;
    --radius-md: 16px;
    --radius-sm: 8px;
    --shadow-soft: 0 10px 40px -10px rgba(0, 0, 0, 0.5);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
}

[data-theme="light"] {
    --bg-color: #f1f5f9;
    --bg-secondary: #ffffff;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    
    --glass-bg: rgba(255, 255, 255, 0.8);
    --glass-border: rgba(0, 0, 0, 0.05);
    --bot-msg-bg: #f8fafc;
    --user-msg-bg: rgba(212, 175, 55, 0.15);
    --shadow-soft: 0 10px 40px -10px rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: var(--font-body);
    background-color: var(--bg-color);
    color: var(--text-primary);
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    transition: background-color var(--transition-normal);
}

/* ==========================================================================
   Background Animation
   ========================================================================== */
.background-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
    filter: blur(80px);
}

.blob {
    position: absolute;
    border-radius: 50%;
    opacity: 0.4;
    animation: float 20s infinite ease-in-out alternate;
}

.blob-1 {
    width: 40vw;
    height: 40vw;
    background: var(--accent-primary-glow);
    top: -10%;
    left: -10%;
}

.blob-2 {
    width: 30vw;
    height: 30vw;
    background: rgba(14, 165, 233, 0.2);
    bottom: -10%;
    right: -10%;
    animation-delay: -5s;
}

@keyframes float {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(10%, 10%) scale(1.2); }
}

/* ==========================================================================
   App Container (Glassmorphism)
   ========================================================================== */
.app-container {
    width: 100%;
    max-width: 900px;
    height: 90vh;
    max-height: 850px;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    margin: 20px;
    transition: all var(--transition-normal);
}

/* ==========================================================================
   Header
   ========================================================================== */
.app-header {
    padding: 20px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--glass-border);
    background: rgba(0, 0, 0, 0.1);
}

.brand {
    display: flex;
    align-items: center;
    gap: 16px;
}

.logo-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--accent-primary), #b8860b);
    border-radius: var(--radius-md);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 20px;
    color: #fff;
    box-shadow: 0 4px 15px var(--accent-primary-glow);
}

.brand-text {
    display: flex;
    flex-direction: column;
}

.brand-title {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.brand-subtitle {
    font-size: 0.75rem;
    color: var(--accent-primary);
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.icon-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1.25rem;
    cursor: pointer;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: var(--transition-fast);
}

.icon-btn:hover {
    color: var(--text-primary);
    background: var(--glass-border);
}

/* ==========================================================================
   Chat Area
   ========================================================================== */
.chat-container {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    scroll-behavior: smooth;
}

/* Custom Scrollbar */
.chat-container::-webkit-scrollbar {
    width: 6px;
}
.chat-container::-webkit-scrollbar-track {
    background: transparent;
}
.chat-container::-webkit-scrollbar-thumb {
    background: var(--glass-border);
    border-radius: 10px;
}
.chat-container::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

.message {
    display: flex;
    gap: 16px;
    max-width: 85%;
    animation: fadeIn 0.4s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    opacity: 0;
    transform: translateY(10px);
}

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

.user-message {
    align-self: flex-end;
    flex-direction: row-reverse;
}

.message-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-shrink: 0;
    font-size: 14px;
}

.bot-message .message-avatar {
    background: var(--bg-secondary);
    color: var(--accent-secondary);
    border: 1px solid var(--glass-border);
}

.user-message .message-avatar {
    background: var(--accent-primary);
    color: #000;
}

.message-content {
    padding: 14px 20px;
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    line-height: 1.6;
    letter-spacing: 0.01em;
}

.bot-message .message-content {
    background: var(--bot-msg-bg);
    border: 1px solid var(--glass-border);
    border-top-left-radius: 4px;
}

.user-message .message-content {
    background: var(--user-msg-bg);
    border: 1px solid rgba(212, 175, 55, 0.3);
    border-top-right-radius: 4px;
}

/* Markdown styling inside messages */
.message-content p { margin-bottom: 0.75em; }
.message-content p:last-child { margin-bottom: 0; }
.message-content strong { color: var(--accent-primary); font-weight: 600; }
.message-content ul, .message-content ol { margin-left: 1.5em; margin-bottom: 0.75em; }
.message-content h1, .message-content h2, .message-content h3 { font-family: var(--font-heading); margin: 0.5em 0; }

/* Typing Indicator */
.typing-indicator {
    display: flex;
    gap: 6px;
    padding: 16px 24px;
    background: var(--bot-msg-bg);
    border-radius: var(--radius-md);
    border-top-left-radius: 4px;
    width: fit-content;
    margin-left: 52px; /* avatar width + gap */
    border: 1px solid var(--glass-border);
}

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

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

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

.hidden { display: none !important; }

/* ==========================================================================
   Input Area
   ========================================================================== */
.input-area {
    padding: 20px 24px;
    background: rgba(0, 0, 0, 0.15);
    border-top: 1px solid var(--glass-border);
}

.chat-form {
    display: flex;
    align-items: flex-end;
    gap: 12px;
    background: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: 8px 12px;
    transition: border-color var(--transition-fast);
}

.chat-form:focus-within {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 1px var(--accent-primary-glow);
}

.chat-input {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 0.95rem;
    line-height: 1.5;
    padding: 10px 4px;
    resize: none;
    max-height: 150px;
    min-height: 44px;
    outline: none;
}

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

.send-btn {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    background: var(--accent-primary);
    color: #000;
    border: none;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.1rem;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.send-btn:hover {
    background: #e5c158;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--accent-primary-glow);
}

.send-btn:active {
    transform: translateY(0);
}

.send-btn:disabled {
    background: var(--glass-border);
    color: var(--text-secondary);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.disclaimer {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 12px;
    font-size: 0.7rem;
    color: var(--text-secondary);
}

.disclaimer i {
    color: var(--accent-primary);
}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 768px) {
    .app-container {
        height: 100vh;
        max-height: 100vh;
        margin: 0;
        border-radius: 0;
        border: none;
    }
    
    .message { max-width: 90%; }
    
    .typing-indicator { margin-left: 48px; }
}