/* ==========================================
   IA-FLOW - Premium Minimalist Design
   ========================================== */

/* CSS Variables */
:root {
    /* Colors - Dark Mode */
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-tertiary: #1a1a24;
    --bg-glass: rgba(255, 255, 255, 0.03);
    --bg-glass-hover: rgba(255, 255, 255, 0.06);

    /* Accent Colors */
    --accent-primary: #6366f1;
    --accent-secondary: #8b5cf6;
    --accent-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #a855f7 100%);
    --accent-glow: 0 0 40px rgba(99, 102, 241, 0.3);

    /* Text Colors - Enhanced for WCAG AA compliance */
    --text-primary: #f8fafc;
    --text-secondary: #b0bcd4;
    --text-muted: #8896ab;

    /* Border Colors */
    --border-subtle: rgba(255, 255, 255, 0.06);
    --border-visible: rgba(255, 255, 255, 0.1);

    /* Status Colors */
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    --info: #3b82f6;

    /* 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: 0.375rem;
    --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: 400ms ease;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.4);

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-size-xs: 0.8rem;
    --font-size-sm: 0.9rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.375rem;
    --font-size-3xl: 1.75rem;
}

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

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

body {
    font-family: var(--font-family);
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Background Gradient */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(ellipse at 20% 20%, rgba(99, 102, 241, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(139, 92, 246, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 50%, rgba(168, 85, 247, 0.05) 0%, transparent 60%);
    pointer-events: none;
    z-index: -1;
}

/* ==========================================
   Layout
   ========================================== */

.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    max-width: 100%;
    overflow-x: hidden;
}

/* ==========================================
   Header
   ========================================== */

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-subtle);
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-xl);
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-icon {
    font-size: var(--font-size-2xl);
    -webkit-text-fill-color: initial;
}

.version-badge {
    font-size: var(--font-size-xs);
    font-weight: 500;
    padding: 2px 8px;
    background: rgba(99, 102, 241, 0.2);
    border: 1px solid rgba(99, 102, 241, 0.4);
    border-radius: var(--radius-full);
    -webkit-text-fill-color: initial;
    color: var(--accent-primary);
    margin-left: var(--spacing-xs);
}

.antigravity-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-glass);
    border: 1px solid var(--border-visible);
    border-radius: var(--radius-full);
    color: var(--text-primary);
    text-decoration: none;
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: all var(--transition-base);
}

.antigravity-link:hover {
    background: var(--bg-glass-hover);
    border-color: var(--accent-primary);
    box-shadow: var(--accent-glow);
    transform: translateY(-1px);
}

.antigravity-icon {
    font-size: var(--font-size-base);
}

.external-icon {
    opacity: 0.6;
    transition: opacity var(--transition-fast);
}

.antigravity-link:hover .external-icon {
    opacity: 1;
}

/* ==========================================
   Main Content
   ========================================== */

.main-content {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: var(--spacing-xl);
}

/* Glass Panel Effect */
.glass-panel {
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
}

/* ==========================================
   reCAPTCHA Overlay
   ========================================== */

.captcha-overlay {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    max-width: 500px;
}

.captcha-container {
    padding: var(--spacing-2xl);
    text-align: center;
}

.captcha-container h2 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-sm);
}

.captcha-container p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

.g-recaptcha {
    display: flex;
    justify-content: center;
    margin-bottom: var(--spacing-lg);
}

.captcha-note {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
}

/* ==========================================
   Chat Container
   ========================================== */

.chat-container {
    width: 100%;
    max-width: 900px;
    height: calc(100vh - 200px);
    min-height: 500px;
    display: flex;
    flex-direction: column;
}

/* Chat Messages */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

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

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

.chat-messages::-webkit-scrollbar-thumb {
    background: var(--border-visible);
    border-radius: var(--radius-full);
}

/* Messages */
.message {
    animation: fadeInUp 0.3s ease;
}

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

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

.message-content {
    display: flex;
    gap: var(--spacing-md);
    max-width: 85%;
}

.message-icon {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    font-size: var(--font-size-lg);
    flex-shrink: 0;
}

.message-text {
    background: var(--bg-tertiary);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border-top-left-radius: var(--radius-sm);
}

.message-text p {
    margin-bottom: var(--spacing-sm);
}

.message-text p:last-child {
    margin-bottom: 0;
}

.message-text .hint {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-sm);
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--border-subtle);
}

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

.user-message .message-icon {
    background: var(--accent-primary);
}

.user-message .message-text {
    background: var(--accent-primary);
    border-top-left-radius: var(--radius-md);
    border-top-right-radius: var(--radius-sm);
}

/* System Message */
.system-message .message-icon {
    background: var(--accent-gradient);
}

/* Typing Indicator */
.typing-dots {
    display: flex;
    gap: 4px;
    padding: 8px 0;
}

.typing-dots span {
    width: 8px;
    height: 8px;
    background: var(--text-secondary);
    border-radius: 50%;
    animation: typing 1.4s infinite;
}

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

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

@keyframes typing {

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

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

/* Message Content Formatting */
.message-text hr {
    border: none;
    border-top: 1px solid var(--border-visible);
    margin: var(--spacing-md) 0;
}

.message-text code {
    background: var(--bg-tertiary);
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.9em;
}

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

.message-text li {
    margin-bottom: var(--spacing-xs);
}

/* Antigravity Sync Block */
.antigravity-block {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
    border: 1px solid var(--accent-primary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin: var(--spacing-md) 0;
}

.antigravity-block-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    font-weight: 600;
    color: var(--accent-primary);
}

.antigravity-block-header svg {
    animation: spin 2s linear infinite;
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

.antigravity-instructions {
    background: var(--bg-primary);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: var(--font-size-sm);
    line-height: 1.5;
    white-space: pre-wrap;
    word-break: break-word;
    max-height: 300px;
    overflow-y: auto;
}

.copy-button {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-md);
    margin-left: auto;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--accent-gradient);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-base);
}

.copy-button:hover {
    transform: translateY(-1px);
    box-shadow: var(--accent-glow);
}

.copy-button.copied {
    background: var(--success);
}

/* ==========================================
   Chat Input
   ========================================== */

.chat-input-container {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border-subtle);
}

.chat-input-wrapper {
    display: flex;
    gap: var(--spacing-sm);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-visible);
    border-radius: var(--radius-lg);
    padding: var(--spacing-sm);
    transition: border-color var(--transition-base);
}

.chat-input-wrapper:focus-within {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.chat-input {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    padding: var(--spacing-sm);
    resize: none;
    min-height: 44px;
    max-height: 150px;
    line-height: 1.5;
}

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

.chat-input:focus {
    outline: none;
}

.send-button {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-gradient);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    cursor: pointer;
    transition: all var(--transition-base);
    flex-shrink: 0;
}

.send-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.send-button:not(:disabled):hover {
    transform: scale(1.05);
    box-shadow: var(--accent-glow);
}

.input-info {
    display: flex;
    justify-content: space-between;
    margin-top: var(--spacing-sm);
    font-size: var(--font-size-xs);
    color: var(--text-muted);
}

.flow-status {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.flow-status::before {
    content: '';
    width: 6px;
    height: 6px;
    background: var(--success);
    border-radius: var(--radius-full);
    animation: pulse 2s infinite;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }
}

/* ==========================================
   Footer
   ========================================== */

.footer {
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    border-top: 1px solid var(--border-subtle);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 900px;
    margin: 0 auto;
}

.token-notice {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.notice-icon {
    font-size: var(--font-size-base);
}

.donate-button {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--accent-gradient);
    border: none;
    border-radius: var(--radius-full);
    color: white;
    font-size: var(--font-size-sm);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
}

.donate-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--accent-glow);
}

.donate-icon {
    font-size: var(--font-size-base);
}

/* ==========================================
   Donation Popup
   ========================================== */

.donation-popup {
    position: fixed;
    bottom: var(--spacing-xl);
    right: var(--spacing-xl);
    z-index: 1000;
    animation: slideInRight 0.4s ease;
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(100px);
    }

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

.donation-popup-content {
    padding: var(--spacing-lg);
    max-width: 350px;
    position: relative;
}

.close-popup {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border: none;
    border-radius: var(--radius-full);
    color: var(--text-secondary);
    font-size: var(--font-size-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.close-popup:hover {
    background: var(--border-visible);
    color: var(--text-primary);
}

.popup-icon {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-sm);
}

.donation-popup-content h3 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-sm);
}

.donation-popup-content p {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

/* Donation Amount Input */
.donation-amount-input {
    margin-bottom: var(--spacing-lg);
}

.donation-amount-input label {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.amount-input-wrapper {
    display: flex;
    align-items: center;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-visible);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) var(--spacing-md);
    transition: border-color var(--transition-base);
}

.amount-input-wrapper:focus-within {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.currency-symbol {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin-right: var(--spacing-xs);
}

.donation-amount-input input {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-family: var(--font-family);
    font-size: var(--font-size-lg);
    font-weight: 600;
    width: 80px;
    text-align: center;
}

.donation-amount-input input:focus {
    outline: none;
}

.donation-amount-input input::-webkit-outer-spin-button,
.donation-amount-input input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.donation-amount-input input[type=number] {
    -moz-appearance: textfield;
}

.currency-label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-left: var(--spacing-xs);
}

.amount-note {
    font-size: var(--font-size-xs) !important;
    color: var(--text-muted) !important;
    margin-top: var(--spacing-sm) !important;
    margin-bottom: 0 !important;
}

.popup-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.btn-primary,
.btn-secondary {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
}

.btn-primary {
    background: var(--accent-gradient);
    border: none;
    color: white;
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: var(--accent-glow);
}

.btn-secondary {
    background: transparent;
    border: 1px solid var(--border-visible);
    color: var(--text-secondary);
}

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

/* ==========================================
   Loading Overlay
   ========================================== */

.loading-overlay {
    position: fixed;
    inset: 0;
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(5px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    z-index: 2000;
}

.loading-spinner {
    width: 48px;
    height: 48px;
    border: 3px solid var(--border-visible);
    border-top-color: var(--accent-primary);
    border-radius: var(--radius-full);
    animation: spin 1s linear infinite;
}

.loading-overlay p {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

/* ==========================================
   Toast Notifications
   ========================================== */

.toast-container {
    position: fixed;
    top: var(--spacing-xl);
    right: var(--spacing-xl);
    z-index: 3000;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.toast {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-visible);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    animation: toastSlideIn 0.4s ease;
    max-width: 400px;
}

@keyframes toastSlideIn {
    from {
        opacity: 0;
        transform: translateX(100px);
    }

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

.toast.toast-exit {
    animation: toastSlideOut 0.3s ease forwards;
}

@keyframes toastSlideOut {
    from {
        opacity: 1;
        transform: translateX(0);
    }

    to {
        opacity: 0;
        transform: translateX(100px);
    }
}

.toast-icon {
    font-size: var(--font-size-2xl);
    flex-shrink: 0;
}

.toast-content {
    flex: 1;
}

.toast-title {
    font-weight: 600;
    font-size: var(--font-size-base);
    margin-bottom: var(--spacing-xs);
}

.toast-message {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.toast-close {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: var(--font-size-lg);
    padding: var(--spacing-xs);
    transition: color var(--transition-fast);
}

.toast-close:hover {
    color: var(--text-primary);
}

/* Toast Variants */
.toast.toast-success {
    border-color: var(--success);
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1) 0%, var(--bg-tertiary) 100%);
}

.toast.toast-error {
    border-color: var(--error);
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.1) 0%, var(--bg-tertiary) 100%);
}

.toast.toast-info {
    border-color: var(--info);
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1) 0%, var(--bg-tertiary) 100%);
}

/* ==========================================
   Responsive
   ========================================== */

@media (max-width: 768px) {
    .header {
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .antigravity-text {
        display: none;
    }

    .main-content {
        padding: var(--spacing-md);
    }

    .chat-container {
        height: calc(100vh - 160px);
    }

    .footer-content {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }

    .donation-popup {
        left: var(--spacing-md);
        right: var(--spacing-md);
        bottom: var(--spacing-md);
    }

    .donation-popup-content {
        max-width: none;
    }
}

@media (max-width: 480px) {
    .message-content {
        max-width: 95%;
    }

    .popup-actions {
        flex-direction: column;
    }
}

/* ==========================================
   Sync Copy Button (for Antigravity blocks)
   ========================================== */

.sync-copy-container {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-subtle);
}

.sync-copy-button {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.2) 0%, rgba(139, 92, 246, 0.2) 100%);
    border: 1px solid var(--accent-primary);
    border-radius: var(--radius-md);
    color: var(--accent-primary);
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-base);
}

.sync-copy-button:hover {
    background: var(--accent-gradient);
    color: white;
    transform: translateY(-1px);
    box-shadow: var(--accent-glow);
}

.sync-copy-button.copied {
    background: var(--success);
    border-color: var(--success);
    color: white;
}

.sync-copy-button svg {
    flex-shrink: 0;
}