/* ============================================
   Shakespeare's Oracle - Modern Chat UI
   A premium dark theme with glassmorphism
   ============================================ */

/* CSS Custom Properties */
:root {
    /* Colors - Rich purple/gold Renaissance theme */
    --primary-hue: 270;
    --accent-hue: 45;
    
    --bg-dark: hsl(260, 25%, 8%);
    --bg-card: hsl(260, 20%, 12%);
    --bg-elevated: hsl(260, 18%, 16%);
    
    --primary: hsl(var(--primary-hue), 60%, 55%);
    --primary-glow: hsl(var(--primary-hue), 70%, 65%);
    --primary-dim: hsl(var(--primary-hue), 40%, 35%);
    
    --accent: hsl(var(--accent-hue), 80%, 55%);
    --accent-glow: hsl(var(--accent-hue), 90%, 65%);
    
    --text-primary: hsl(45, 20%, 95%);
    --text-secondary: hsl(45, 15%, 70%);
    --text-muted: hsl(260, 10%, 50%);
    
    --glass-bg: rgba(40, 30, 60, 0.6);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-glow: rgba(139, 92, 246, 0.15);
    
    --success: hsl(160, 70%, 45%);
    --error: hsl(0, 70%, 55%);
    
    /* Typography */
    --font-display: 'Cinzel', serif;
    --font-body: 'Crimson Pro', Georgia, serif;
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 40px var(--glass-glow);
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: 1.125rem;
    line-height: 1.7;
    color: var(--text-primary);
    background: var(--bg-dark);
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* App Container */
.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    max-width: 900px;
    margin: 0 auto;
    padding: var(--space-md);
    position: relative;
    z-index: 1;
}

/* Animated Background Effects */
.background-effects {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
    overflow: hidden;
}

.orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
    animation: float 20s ease-in-out infinite;
}

.orb-1 {
    width: 500px;
    height: 500px;
    background: linear-gradient(135deg, var(--primary-dim), transparent);
    top: -150px;
    right: -100px;
    animation-delay: 0s;
}

.orb-2 {
    width: 400px;
    height: 400px;
    background: linear-gradient(135deg, hsl(300, 50%, 30%), transparent);
    bottom: 10%;
    left: -150px;
    animation-delay: -7s;
}

.orb-3 {
    width: 300px;
    height: 300px;
    background: linear-gradient(135deg, var(--accent), transparent);
    top: 40%;
    right: -100px;
    animation-delay: -14s;
    opacity: 0.3;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(30px, -30px) scale(1.05); }
    50% { transform: translate(-20px, 20px) scale(0.95); }
    75% { transform: translate(10px, 40px) scale(1.02); }
}

/* Glass Effect */
.glass-effect {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-md), var(--shadow-glow);
}

/* Header */
.header {
    text-align: center;
    padding: var(--space-xl) var(--space-md);
    margin-bottom: var(--space-lg);
}

.header-content {
    animation: fadeInDown 0.8s ease-out;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-sm);
}

.logo-icon {
    font-size: 2.5rem;
    animation: pulse 3s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.header h1 {
    font-family: var(--font-display);
    font-size: clamp(1.75rem, 5vw, 2.5rem);
    font-weight: 700;
    background: linear-gradient(135deg, var(--text-primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 0.05em;
}

.tagline {
    font-style: italic;
    color: var(--text-secondary);
    font-size: 1rem;
}

/* Chat Container */
.chat-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.chat-window {
    flex: 1;
    min-height: 400px;
    max-height: 55vh;
    overflow-y: auto;
    padding: var(--space-md);
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
    scrollbar-width: thin;
    scrollbar-color: var(--primary-dim) transparent;
}

.chat-window::-webkit-scrollbar {
    width: 6px;
}

.chat-window::-webkit-scrollbar-track {
    background: transparent;
}

.chat-window::-webkit-scrollbar-thumb {
    background: var(--primary-dim);
    border-radius: var(--radius-full);
}

/* Messages */
.message {
    display: flex;
    gap: var(--space-md);
    animation: fadeInUp 0.4s ease-out;
    max-width: 85%;
}

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

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

.message-avatar {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
    background: var(--bg-elevated);
    border: 2px solid var(--glass-border);
}

.user-message .message-avatar {
    background: linear-gradient(135deg, var(--primary), var(--primary-dim));
}

.message-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.message-bubble {
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-lg);
    line-height: 1.6;
}

.user-message .message-bubble {
    background: linear-gradient(135deg, var(--primary), hsl(280, 60%, 45%));
    border: none;
    box-shadow: var(--shadow-md);
}

.assistant-message .message-bubble {
    border-radius: var(--radius-lg);
    border-top-left-radius: var(--radius-sm);
}

.user-message .message-bubble {
    border-radius: var(--radius-lg);
    border-top-right-radius: var(--radius-sm);
}

.message-time {
    font-size: 0.75rem;
    color: var(--text-muted);
    padding: 0 var(--space-sm);
}

.user-message .message-time {
    text-align: right;
}

.mt-2 {
    margin-top: var(--space-sm);
}

/* Input Container */
.input-container {
    border-radius: var(--radius-lg);
    padding: var(--space-md);
    margin-top: auto;
}

.chat-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.input-wrapper {
    display: flex;
    align-items: flex-end;
    gap: var(--space-sm);
}

textarea {
    flex: 1;
    background: var(--bg-elevated);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 1rem;
    resize: none;
    min-height: 52px;
    max-height: 150px;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.2);
}

textarea::placeholder {
    color: var(--text-muted);
    font-style: italic;
}

.send-button {
    width: 52px;
    height: 52px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--primary), var(--primary-glow));
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
    flex-shrink: 0;
}

.send-button svg {
    width: 22px;
    height: 22px;
    color: white;
    transform: translateX(2px);
}

.send-button:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 20px rgba(139, 92, 246, 0.4);
}

.send-button:active {
    transform: scale(0.98);
}

.send-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.input-footer {
    display: flex;
    justify-content: space-between;
    padding: 0 var(--space-xs);
}

.char-count, .model-info {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Example Questions */
.examples-section {
    padding: var(--space-lg) 0;
    text-align: center;
}

.examples-section h3 {
    font-family: var(--font-display);
    font-size: 0.9rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-md);
}

.example-chips {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    justify-content: center;
}

.example-chip {
    background: var(--bg-elevated);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-full);
    padding: var(--space-sm) var(--space-md);
    font-family: var(--font-body);
    font-size: 0.875rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.example-chip:hover {
    background: var(--primary-dim);
    border-color: var(--primary);
    color: var(--text-primary);
    transform: translateY(-2px);
}

/* Footer */
.footer {
    text-align: center;
    padding: var(--space-lg);
    color: var(--text-muted);
    font-size: 0.875rem;
}

.footer a {
    color: var(--primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer a:hover {
    color: var(--primary-glow);
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 5, 20, 0.8);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    animation: fadeIn 0.3s ease-out;
}

.loading-overlay[hidden] {
    display: none;
}

.loading-content {
    padding: var(--space-xl) var(--space-2xl);
    border-radius: var(--radius-lg);
    text-align: center;
}

.quill-animation {
    margin-bottom: var(--space-md);
}

.quill {
    font-size: 3rem;
    display: inline-block;
    animation: write 1.5s ease-in-out infinite;
}

@keyframes write {
    0%, 100% { transform: rotate(-10deg) translateY(0); }
    25% { transform: rotate(5deg) translateY(-5px); }
    50% { transform: rotate(-5deg) translateY(0); }
    75% { transform: rotate(10deg) translateY(-3px); }
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Error Message Style */
.message.error .message-bubble {
    background: linear-gradient(135deg, hsl(0, 50%, 25%), hsl(0, 40%, 20%));
    border-color: hsl(0, 50%, 35%);
}

/* Typing Indicator */
.typing-indicator {
    display: flex;
    gap: 4px;
    padding: var(--space-md);
}

.typing-indicator span {
    width: 8px;
    height: 8px;
    background: var(--text-muted);
    border-radius: 50%;
    animation: bounce 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 bounce {
    0%, 80%, 100% { transform: scale(0); }
    40% { transform: scale(1); }
}

/* Responsive */
@media (max-width: 640px) {
    .app-container {
        padding: var(--space-sm);
    }
    
    .header {
        padding: var(--space-lg) var(--space-sm);
    }
    
    .message {
        max-width: 95%;
    }
    
    .message-avatar {
        width: 36px;
        height: 36px;
        font-size: 1.2rem;
    }
    
    .message-bubble {
        padding: var(--space-sm) var(--space-md);
    }
    
    .example-chips {
        flex-direction: column;
        align-items: stretch;
    }
    
    .example-chip {
        text-align: center;
    }
}