/* ===================================
   AISIRE - Modern AI Chat Interface
   Kota Serang Smart Technology
   =================================== */

/* CSS Variables - Design Tokens */
:root {
    /* Primary Colors - Serang themed (Blue-Green gradient) */
    --primary-gradient: linear-gradient(135deg, #0ea5e9 0%, #06b6d4 50%, #10b981 100%);
    --primary-500: #0ea5e9;
    --primary-600: #0284c7;
    --primary-700: #0369a1;

    /* Accent Colors */
    --accent-emerald: #10b981;
    --accent-cyan: #06b6d4;
    --accent-amber: #f59e0b;

    /* Dark Theme Colors */
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-card: rgba(30, 41, 59, 0.8);
    --bg-glass: rgba(15, 23, 42, 0.85);

    /* Text Colors */
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    /* Border & Shadow */
    --border-color: rgba(148, 163, 184, 0.1);
    --border-glow: rgba(14, 165, 233, 0.3);
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.2);
    --shadow-glow: 0 0 30px rgba(14, 165, 233, 0.15);

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;

    /* Typography */
    --font-sans: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
}

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

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

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    overflow-x: hidden;
}

/* Background Pattern */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(circle at 20% 20%, rgba(14, 165, 233, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(16, 185, 129, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(6, 182, 212, 0.05) 0%, transparent 70%);
    pointer-events: none;
    z-index: -1;
}

/* ===================================
   HEADER
   =================================== */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-md) var(--spacing-lg);
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
}

.header-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
}

.logo-icon {
    width: 42px;
    height: 42px;
    background: var(--primary-gradient);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    font-weight: 700;
    color: white;
    box-shadow: var(--shadow-glow);
    position: relative;
    overflow: hidden;
}

.logo-icon::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.2) 0%, transparent 50%);
}

.logo-icon i {
    position: relative;
    z-index: 1;
}

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

.logo-title {
    font-size: 1.35rem;
    font-weight: 700;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
}

.logo-tagline {
    font-size: 0.7rem;
    color: var(--text-secondary);
    font-weight: 400;
    letter-spacing: 0.02em;
}

.btn-about {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-base);
    font-family: inherit;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.btn-about:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border-color: var(--primary-500);
    box-shadow: 0 0 20px rgba(14, 165, 233, 0.2);
}

/* ===================================
   MAIN CHAT LAYOUT
   =================================== */
.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    padding-top: 70px;
}

.chat-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    max-width: 900px;
    width: 100%;
    margin: 0 auto;
    padding: var(--spacing-lg);
    overflow: hidden;
}

/* ===================================
   CHAT BOX
   =================================== */
.chat-box {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    scroll-behavior: smooth;
}

/* Custom Scrollbar */
.chat-box::-webkit-scrollbar {
    width: 6px;
}

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

.chat-box::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
}

.chat-box::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* ===================================
   EMPTY STATE / WELCOME
   =================================== */
.empty-state {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--spacing-xl);
    animation: fadeInUp 0.6s ease-out;
}

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

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

.empty-state-icon {
    width: 80px;
    height: 80px;
    background: var(--primary-gradient);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-glow);
    animation: pulse 3s ease-in-out infinite;
}

@keyframes pulse {

    0%,
    100% {
        box-shadow: 0 0 30px rgba(14, 165, 233, 0.2);
    }

    50% {
        box-shadow: 0 0 50px rgba(14, 165, 233, 0.4);
    }
}

.empty-state-icon i {
    font-size: 2.5rem;
    color: white;
}

.empty-state h2 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.empty-state p {
    color: var(--text-secondary);
    font-size: 1rem;
    max-width: 450px;
    margin-bottom: var(--spacing-xl);
    line-height: 1.7;
}

/* Quick Prompt Chips */
.quick-prompts {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    justify-content: center;
    max-width: 700px;
}

.prompt-chip {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-base);
    font-family: inherit;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.prompt-chip i {
    font-size: 0.8rem;
    color: var(--primary-500);
}

.prompt-chip:hover {
    background: var(--bg-secondary);
    border-color: var(--primary-500);
    color: var(--text-primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(14, 165, 233, 0.15);
}

.prompt-chip:active {
    transform: translateY(0);
}

/* ===================================
   CHAT MESSAGES
   =================================== */
.chat-message {
    display: flex;
    gap: var(--spacing-md);
    animation: messageSlide 0.3s ease-out;
}

@keyframes messageSlide {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

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

/* User Message */
.user-message {
    flex-direction: row-reverse;
}

.user-message .message-bubble {
    background: var(--primary-gradient);
    color: white;
    border-radius: var(--radius-lg) var(--radius-lg) var(--spacing-xs) var(--radius-lg);
    max-width: 75%;
    box-shadow: var(--shadow-md);
}

/* AI Message */
.ai-message {
    flex-direction: row;
}

.ai-message .message-bubble {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: var(--radius-lg) var(--radius-lg) var(--radius-lg) var(--spacing-xs);
    max-width: 85%;
}

/* Message Avatar */
.message-avatar {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 0.9rem;
}

.user-message .message-avatar {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
}

.ai-message .message-avatar {
    background: var(--primary-gradient);
    color: white;
    box-shadow: var(--shadow-glow);
}

/* Message Bubble */
.message-bubble {
    padding: var(--spacing-md) var(--spacing-lg);
    position: relative;
}

.message-bubble p {
    margin: 0;
    line-height: 1.7;
}

.message-bubble pre {
    background: var(--bg-primary);
    border-radius: var(--radius-sm);
    padding: var(--spacing-md);
    overflow-x: auto;
    margin: var(--spacing-sm) 0;
    border: 1px solid var(--border-color);
}

.message-bubble code {
    font-family: 'Fira Code', 'Consolas', monospace;
    font-size: 0.875rem;
}

.message-bubble ul,
.message-bubble ol {
    margin: var(--spacing-sm) 0;
    padding-left: var(--spacing-lg);
}

.message-bubble li {
    margin: var(--spacing-xs) 0;
}

/* Copy Button */
.copy-btn {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    background: var(--bg-tertiary);
    border: none;
    color: var(--text-muted);
    width: 28px;
    height: 28px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    opacity: 0;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
}

.message-bubble:hover .copy-btn {
    opacity: 1;
}

.copy-btn:hover {
    background: var(--primary-500);
    color: white;
}

.copy-btn.copied {
    background: var(--accent-emerald);
    color: white;
}

/* ===================================
   TYPING INDICATOR
   =================================== */
.typing-indicator {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) 0;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.typing-indicator span {
    opacity: 0.8;
}

.typing-animation {
    display: flex;
    gap: 4px;
    align-items: center;
}

.typing-dot {
    width: 8px;
    height: 8px;
    background: var(--primary-500);
    border-radius: 50%;
    animation: typingBounce 1.4s ease-in-out infinite;
}

.typing-dot:nth-child(1) {
    animation-delay: 0s;
}

.typing-dot:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-dot:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes typingBounce {

    0%,
    60%,
    100% {
        transform: translateY(0);
        opacity: 0.4;
    }

    30% {
        transform: translateY(-8px);
        opacity: 1;
    }
}

/* ===================================
   INPUT BAR
   =================================== */
.chat-input-container {
    padding: var(--spacing-md) 0;
    border-top: 1px solid var(--border-color);
    background: transparent;
}

.chat-input {
    display: flex;
    gap: var(--spacing-sm);
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-sm);
    transition: all var(--transition-base);
}

.chat-input:focus-within {
    border-color: var(--primary-500);
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.15);
}

.chat-input input {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-size: 1rem;
    font-family: inherit;
    padding: var(--spacing-sm) var(--spacing-md);
}

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

.chat-input button {
    background: var(--primary-gradient);
    border: none;
    color: white;
    width: 44px;
    height: 44px;
    border-radius: var(--radius-lg);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-md);
}

.chat-input button:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-glow);
}

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

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

/* ===================================
   ABOUT MODAL
   =================================== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    padding: var(--spacing-lg);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    max-width: 500px;
    width: 100%;
    padding: var(--spacing-xl);
    transform: scale(0.9) translateY(20px);
    transition: all var(--transition-base);
    box-shadow: var(--shadow-lg);
}

.modal-overlay.active .modal-content {
    transform: scale(1) translateY(0);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-lg);
}

.modal-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.modal-close {
    background: var(--bg-tertiary);
    border: none;
    color: var(--text-secondary);
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: var(--primary-500);
    color: white;
}

.modal-body {
    color: var(--text-secondary);
    line-height: 1.8;
}

.modal-body p {
    margin-bottom: var(--spacing-md);
}

.modal-body strong {
    color: var(--text-primary);
}

.feature-list {
    list-style: none;
    margin: var(--spacing-md) 0;
}

.feature-list li {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.feature-list li i {
    color: var(--accent-emerald);
    margin-top: 4px;
}

/* ===================================
   FOOTER
   =================================== */
footer {
    text-align: center;
    padding: var(--spacing-md);
    color: var(--text-muted);
    font-size: 0.8rem;
    border-top: 1px solid var(--border-color);
}

footer a {
    color: var(--primary-500);
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

/* ===================================
   LANDING PAGE STYLES (INDEX)
   =================================== */
.landing-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.hero {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-2xl);
    padding-top: 100px;
}

.hero-content {
    text-align: center;
    max-width: 700px;
    animation: fadeInUp 0.8s ease-out;
}

.hero-icon {
    width: 120px;
    height: 120px;
    background: transparent;
    border-radius: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-xl);
    animation: float 4s ease-in-out infinite;
}

.hero-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    filter: drop-shadow(0 10px 20px rgba(0, 0, 0, 0.3));
}

@keyframes float {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-10px);
    }
}

.hero-title {
    font-size: 8rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    line-height: 1;
    letter-spacing: -0.03em;
}

.hero-title .highlight {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 60px rgba(14, 165, 233, 0.5);
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--text-secondary);
    font-weight: 300;
    margin-bottom: var(--spacing-lg);
    text-transform: uppercase;
    letter-spacing: 0.2em;
}

.hero h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.hero h1 .highlight {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.8;
}

.btn-start {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: var(--primary-gradient);
    color: white;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-full);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-glow);
}

.btn-start:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 40px rgba(14, 165, 233, 0.3);
}

.btn-start i {
    transition: transform var(--transition-base);
}

.btn-start:hover i {
    transform: translateX(4px);
}

/* ===================================
   RESPONSIVE DESIGN
   =================================== */
@media (max-width: 768px) {
    :root {
        font-size: 15px;
    }

    header {
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .header-container {
        gap: var(--spacing-sm);
    }

    .logo-tagline {
        display: none;
    }

    .logo-title {
        font-size: 1.2rem;
    }

    .logo-icon {
        width: 36px;
        height: 36px;
        font-size: 1rem;
    }

    .btn-about span {
        display: none;
    }

    .btn-about {
        padding: var(--spacing-sm);
    }

    .app-container {
        padding-top: 60px;
    }

    .chat-container {
        padding: var(--spacing-md);
    }

    .empty-state {
        padding: var(--spacing-lg);
    }

    .empty-state h2 {
        font-size: 1.5rem;
    }

    .empty-state-icon {
        width: 60px;
        height: 60px;
    }

    .empty-state-icon i {
        font-size: 1.75rem;
    }

    .quick-prompts {
        gap: var(--spacing-xs);
    }

    .prompt-chip {
        font-size: 0.8rem;
        padding: var(--spacing-xs) var(--spacing-sm);
    }

    .user-message .message-bubble,
    .ai-message .message-bubble {
        max-width: 90%;
    }

    .message-avatar {
        width: 30px;
        height: 30px;
        font-size: 0.75rem;
    }

    .message-bubble {
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .hero {
        padding: var(--spacing-lg);
        padding-top: 80px;
    }

    .hero h1 {
        font-size: 1.75rem;
    }

    .hero-title {
        font-size: 4.5rem;
    }

    .hero-subtitle {
        font-size: 1rem;
        letter-spacing: 0.15em;
    }

    .hero p {
        font-size: 1rem;
    }

    .hero-icon {
        width: 70px;
        height: 70px;
    }

    .hero-icon i {
        font-size: 2rem;
    }

    .modal-content {
        padding: var(--spacing-lg);
        margin: var(--spacing-md);
    }
}

@media (max-width: 480px) {
    .prompt-chip {
        flex: 1 1 100%;
        justify-content: center;
    }

    .chat-input {
        border-radius: var(--radius-lg);
    }

    .chat-input button {
        width: 40px;
        height: 40px;
    }
}

/* ===================================
   UTILITIES
   =================================== */
.hidden {
    display: none !important;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}