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

/* CSS Custom Properties for theming */
:root {
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --primary-light: #eef2ff;
    --primary-glow: rgba(79, 70, 229, 0.15);
    --success: #059669;
    --success-hover: #047857;
    --surface: #ffffff;
    --surface-raised: #f8fafc;
    --surface-hover: #f1f5f9;
    --border: #e2e8f0;
    --border-light: #f1f5f9;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --bg: #f8fafc;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.08);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
}

/* Global styles */
* {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

body {
    background: var(--bg);
    min-height: 100vh;
    color: var(--text-primary);
}

/* Smooth transitions - only on specific properties */
.card, .btn, .form-control, textarea.form-control, .accordion-button, .badge {
    transition: box-shadow 0.2s ease, transform 0.15s ease, border-color 0.2s ease, background-color 0.2s ease;
}

/* Header styling */
h1 {
    background: linear-gradient(135deg, var(--primary) 0%, #7c3aed 50%, #a855f7 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 800;
    letter-spacing: -0.025em;
}

h2, h3, h4, h5, h6 {
    color: var(--text-primary);
    font-weight: 600;
    letter-spacing: -0.015em;
}

/* Card improvements */
.card {
    border: 1px solid var(--border) !important;
    border-radius: var(--radius-md) !important;
    box-shadow: var(--shadow-sm) !important;
    background-color: var(--surface) !important;
    overflow: hidden;
}

.card:hover {
    box-shadow: var(--shadow-md) !important;
}

.card-header {
    border-bottom: 1px solid var(--border-light) !important;
    background-color: var(--surface-raised) !important;
    color: var(--text-primary) !important;
    padding: 0.875rem 1.125rem !important;
    font-weight: 600;
    font-size: 0.95rem;
}

.card-body {
    padding: 1.125rem !important;
}

/* Button improvements */
.btn {
    border-radius: var(--radius-sm) !important;
    font-weight: 500;
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
    border: 1px solid transparent !important;
    letter-spacing: -0.01em;
}

.btn:hover {
    transform: translateY(-1px);
}

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

.btn-primary {
    background-color: var(--primary) !important;
    border-color: var(--primary) !important;
    box-shadow: 0 1px 3px rgba(79, 70, 229, 0.3) !important;
}

.btn-primary:hover {
    background-color: var(--primary-hover) !important;
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.35) !important;
}

.btn-success {
    background-color: var(--success) !important;
    border-color: var(--success) !important;
    box-shadow: 0 1px 3px rgba(5, 150, 105, 0.3) !important;
}

.btn-success:hover {
    background-color: var(--success-hover) !important;
    box-shadow: 0 4px 12px rgba(5, 150, 105, 0.35) !important;
}

.btn-secondary {
    background-color: #64748b !important;
    border-color: #64748b !important;
}

.btn-secondary:hover {
    background-color: #475569 !important;
}

.btn-outline-secondary {
    color: var(--text-secondary) !important;
    border-color: var(--border) !important;
    background: transparent !important;
}

.btn-outline-secondary:hover {
    background: var(--surface-hover) !important;
    color: var(--text-primary) !important;
    border-color: #cbd5e1 !important;
}

.btn-sm {
    padding: 0.4rem 0.8rem !important;
    font-size: 0.85rem !important;
}

/* Sidebar cipher buttons */
.cipher-nav-btn {
    border-radius: var(--radius-sm) !important;
    text-align: left !important;
    display: flex !important;
    align-items: center !important;
    gap: 0.5rem !important;
    padding: 0.5rem 0.75rem !important;
    font-size: 0.85rem !important;
    min-height: 38px !important;
    width: 100% !important;
    margin-bottom: 0.25rem !important;
    font-weight: 500 !important;
}

.cipher-nav-btn i {
    font-size: 0.9rem;
    width: 1.25rem;
    text-align: center;
    flex-shrink: 0;
}

/* Sidebar neutral styling */
.bg-light {
    background: var(--surface) !important;
    border-right: 1px solid var(--border);
}

/* Accordion styling */
.accordion-button {
    font-weight: 600 !important;
    font-size: 0.8rem !important;
    color: var(--text-secondary) !important;
    text-transform: uppercase !important;
    letter-spacing: 0.05em !important;
    padding: 0.625rem 0.75rem !important;
    background: transparent !important;
    border: none !important;
    box-shadow: none !important;
}

.accordion-button:not(.collapsed) {
    color: var(--primary) !important;
    background: var(--primary-light) !important;
    box-shadow: none !important;
}

.accordion-button::after {
    width: 0.875rem;
    height: 0.875rem;
    background-size: 0.875rem;
}

.accordion-item {
    border: none !important;
    background: transparent !important;
}

.accordion-body {
    padding: 0.25rem 0 0.5rem 0 !important;
}

/* Input improvements */
.form-control, textarea.form-control {
    border-radius: var(--radius-sm) !important;
    border: 1.5px solid var(--border) !important;
    padding: 0.625rem 0.875rem;
    font-size: 0.9rem;
    background: var(--surface) !important;
    color: var(--text-primary) !important;
}

.form-control:focus, textarea.form-control:focus {
    border-color: var(--primary) !important;
    box-shadow: 0 0 0 3px var(--primary-glow) !important;
}

.form-control::placeholder, textarea.form-control::placeholder {
    color: var(--text-muted) !important;
}

.form-select {
    border-radius: var(--radius-sm) !important;
    border: 1.5px solid var(--border) !important;
    font-size: 0.9rem;
}

.form-select:focus {
    border-color: var(--primary) !important;
    box-shadow: 0 0 0 3px var(--primary-glow) !important;
}

/* Alert styling */
.alert-warning {
    background-color: #fffbeb !important;
    border: 1px solid #fbbf24 !important;
    color: #92400e !important;
    border-radius: var(--radius-sm) !important;
}

.alert-danger {
    border-radius: var(--radius-sm) !important;
}

.alert-success {
    border-radius: var(--radius-sm) !important;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}

/* Animations */
@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

@keyframes typing {
    0%, 60%, 100% {
        opacity: 0.3;
    }
    30% {
        opacity: 1;
    }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

/* AI Chat minimized state */
.ai-chat-minimized {
    height: auto !important;
    overflow: hidden !important;
}

.ai-chat-minimized #ai-chat-history {
    display: none !important;
}

.ai-chat-minimized .input-area {
    display: none !important;
}

/* Category sections */
.cipher-category {
    margin-bottom: 1rem;
}

.category-header {
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--radius-sm);
    background: var(--surface-raised);
    margin-bottom: 0.5rem;
}

.category-header:hover {
    background: var(--surface-hover);
}

.category-content {
    padding-left: 0.5rem;
}

/* Markdown styling */
.markdown p {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 0.9rem;
}

.markdown code {
    background-color: var(--primary-light);
    padding: 2px 6px;
    border-radius: 4px;
    color: var(--primary);
    font-family: 'Courier New', monospace;
    font-size: 0.85em;
}

/* Badge styling */
.badge {
    font-weight: 500;
    padding: 0.4em 0.75em;
    border-radius: 6px;
    font-size: 0.75rem;
    letter-spacing: 0.01em;
}

/* Focus styles */
*:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* Copy button styling */
.copy-btn {
    opacity: 0.7;
    transition: opacity 0.2s ease !important;
}

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

/* Example button styling */
.example-btn {
    font-size: 0.75rem !important;
    padding: 0.2rem 0.6rem !important;
    border-radius: 20px !important;
    font-weight: 500 !important;
    color: var(--primary) !important;
    border-color: var(--primary) !important;
    background: transparent !important;
}

.example-btn:hover {
    background: var(--primary-light) !important;
    color: var(--primary-hover) !important;
    transform: none !important;
}

/* Character count */
.char-count {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-align: right;
    margin-top: 2px;
}

/* Scroll to top button */
.scroll-top-btn {
    position: fixed !important;
    bottom: 20px !important;
    right: 20px !important;
    z-index: 1040 !important;
    width: 40px !important;
    height: 40px !important;
    border-radius: 50% !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    padding: 0 !important;
    box-shadow: var(--shadow-md) !important;
    background: var(--primary) !important;
    border: none !important;
    color: white !important;
}

.scroll-top-btn:hover {
    box-shadow: var(--shadow-lg) !important;
    transform: translateY(-2px) !important;
}

/* Hero section */
.hero-subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 400;
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

/* Feature pills in header */
.feature-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.3rem 0.75rem;
    border-radius: 20px;
    background: var(--primary-light);
    color: var(--primary);
    font-size: 0.75rem;
    font-weight: 500;
    margin: 0.2rem;
    border: 1px solid rgba(79, 70, 229, 0.15);
}

.feature-pill i {
    font-size: 0.7rem;
}

/* Result card styling */
.result-card {
    border-left: 3px solid var(--primary) !important;
}

.result-card .card-header {
    background: linear-gradient(135deg, var(--primary-light) 0%, #f0fdf4 100%) !important;
}

/* Steps card improvements */
.step-card {
    border-left: 3px solid #e2e8f0 !important;
    margin-bottom: 0.5rem !important;
}

.step-card:hover {
    border-left-color: var(--primary) !important;
}

/* Better textarea readonly styling */
textarea[readonly] {
    background: var(--surface-raised) !important;
    font-family: 'Courier New', monospace;
    font-size: 0.88rem !important;
    line-height: 1.6;
}

/* Tooltip styling */
.tooltip-inner {
    background: var(--text-primary);
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    padding: 0.4rem 0.75rem;
}

/* Selection color */
::selection {
    background: var(--primary-glow);
    color: var(--text-primary);
}

/* HR styling */
hr {
    border-color: var(--border-light) !important;
    opacity: 1 !important;
}

/* Footer styling */
.footer-link {
    color: var(--primary) !important;
    text-decoration: none !important;
    font-weight: 500;
}

.footer-link:hover {
    color: var(--primary-hover) !important;
    text-decoration: underline !important;
}