/* ============================================
   JWT Decoder - Professional Stylesheet
   ============================================ */

/* CSS Variables */
:root {
    /* Colors */
    --color-primary: #6366f1;
    --color-primary-hover: #4f46e5;
    --color-primary-light: #e0e7ff;
    --color-success: #10b981;
    --color-success-bg: #d1fae5;
    --color-error: #ef4444;
    --color-error-bg: #fee2e2;
    --color-warning: #f59e0b;
    --color-warning-bg: #fef3c7;
    
    /* Neutrals */
    --color-white: #ffffff;
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    
    /* 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: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
}

/* 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: linear-gradient(135deg, var(--color-gray-50) 0%, var(--color-gray-100) 100%);
    color: var(--color-gray-800);
    line-height: 1.6;
    min-height: 100vh;
}

/* App Container */
.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Header */
.header {
    background: var(--color-white);
    border-bottom: 1px solid var(--color-gray-200);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(8px);
    background: rgba(255, 255, 255, 0.95);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo-icon {
    width: 32px;
    height: 32px;
    color: var(--color-primary);
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-gray-900);
    letter-spacing: -0.025em;
}

.header-nav {
    display: flex;
    gap: var(--spacing-lg);
}

.nav-link {
    color: var(--color-gray-600);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9375rem;
    transition: color var(--transition-fast);
    position: relative;
}

.nav-link:hover {
    color: var(--color-primary);
}

.nav-link.active {
    color: var(--color-primary);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-primary);
    border-radius: var(--radius-full);
}

/* Main Content */
.main-content {
    flex: 1;
    padding: var(--spacing-2xl) var(--spacing-xl);
}

.content-wrapper {
    max-width: 1200px;
    margin: 0 auto;
}

/* Hero Section */
.hero {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.025em;
    background: linear-gradient(135deg, var(--color-gray-900) 0%, var(--color-gray-700) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--color-gray-600);
    max-width: 600px;
    margin: 0 auto;
}

/* Decoder Section */
.decoder-section {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

/* Cards */
.input-card,
.claims-card {
    background: var(--color-white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-xl);
    border: 1px solid var(--color-gray-200);
}

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

.card-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-gray-900);
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    font-family: var(--font-family);
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
}

.btn-icon {
    width: 16px;
    height: 16px;
}

.btn-primary {
    background: var(--color-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
}

.btn-primary:hover {
    background: var(--color-primary-hover);
    border-color: var(--color-primary-hover);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--color-white);
    color: var(--color-gray-700);
    border-color: var(--color-gray-300);
}

.btn-secondary:hover {
    background: var(--color-gray-50);
    border-color: var(--color-gray-400);
}

.btn-small {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.8125rem;
}

.btn-large {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1rem;
    width: 100%;
    justify-content: center;
    margin-top: var(--spacing-lg);
}

/* Input Wrapper */
.input-wrapper {
    position: relative;
}

.token-input {
    width: 100%;
    padding: var(--spacing-md);
    font-family: var(--font-mono);
    font-size: 0.875rem;
    line-height: 1.6;
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-md);
    resize: vertical;
    transition: all var(--transition-fast);
    background: var(--color-gray-50);
}

.token-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-light);
    background: var(--color-white);
}

.token-input::placeholder {
    color: var(--color-gray-400);
}

.input-hint {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
    font-size: 0.8125rem;
    color: var(--color-gray-500);
}

.hint-icon {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

/* Results Container */
.results-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Status Card */
.status-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid;
}

.status-card.valid {
    background: var(--color-success-bg);
    border-color: var(--color-success);
}

.status-card.expired {
    background: var(--color-error-bg);
    border-color: var(--color-error);
}

.status-indicator {
    width: 12px;
    height: 12px;
    border-radius: var(--radius-full);
    flex-shrink: 0;
}

.status-card.valid .status-indicator {
    background: var(--color-success);
    box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.2);
}

.status-card.expired .status-indicator {
    background: var(--color-error);
    box-shadow: 0 0 0 4px rgba(239, 68, 68, 0.2);
}

.status-content {
    flex: 1;
}

.status-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-xs);
}

.status-description {
    font-size: 0.875rem;
    color: var(--color-gray-600);
}

/* Token Parts */
.token-parts {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.part-card {
    background: var(--color-gray-50);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.part-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-gray-100);
    border-bottom: 1px solid var(--color-gray-200);
}

.part-label {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-gray-700);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.part-badge {
    font-size: 0.6875rem;
    font-weight: 500;
    color: var(--color-gray-600);
    background: var(--color-white);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-gray-200);
}

.part-content {
    padding: var(--spacing-md);
    margin: 0;
    overflow-x: auto;
    max-height: 200px;
    overflow-y: auto;
}

.part-content code {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    line-height: 1.6;
    color: var(--color-gray-700);
    white-space: pre-wrap;
    word-break: break-all;
}

/* Claims Card */
.claims-content {
    background: var(--color-gray-900);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    overflow-x: auto;
    max-height: 400px;
    overflow-y: auto;
}

.json-display {
    margin: 0;
}

.json-display code {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    line-height: 1.6;
    color: var(--color-gray-100);
    white-space: pre-wrap;
    word-break: break-all;
}

/* Syntax Highlighting */
.json-key { color: #7dd3fc; }
.json-string { color: #86efac; }
.json-number { color: #fcd34d; }
.json-boolean { color: #fca5a5; }
.json-null { color: #cbd5e1; }

/* Info Grid */
.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.info-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--color-gray-50);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-md);
}

.info-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary-light);
    border-radius: var(--radius-md);
    flex-shrink: 0;
}

.info-icon svg {
    width: 20px;
    height: 20px;
    color: var(--color-primary);
}

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

.info-label {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-gray-500);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.info-value {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--color-gray-900);
}

.status-badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.8125rem;
}

.status-badge.valid {
    background: var(--color-success-bg);
    color: var(--color-success);
}

.status-badge.expired {
    background: var(--color-error-bg);
    color: var(--color-error);
}

/* Error Message */
.error-message {
    background: var(--color-error-bg);
    border: 1px solid var(--color-error);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    animation: shake 0.3s ease;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

.error-content {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
}

.error-icon {
    width: 24px;
    height: 24px;
    color: var(--color-error);
    flex-shrink: 0;
}

.error-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-xs);
}

.error-description {
    font-size: 0.875rem;
    color: var(--color-gray-700);
}

/* Footer */
.footer {
    background: var(--color-white);
    border-top: 1px solid var(--color-gray-200);
    padding: var(--spacing-lg) var(--spacing-xl);
    margin-top: auto;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-content p {
    font-size: 0.875rem;
    color: var(--color-gray-500);
}

.footer-links {
    display: flex;
    gap: var(--spacing-lg);
}

.footer-link {
    font-size: 0.875rem;
    color: var(--color-gray-500);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .header-content {
        padding: var(--spacing-md);
    }
    
    .hero-title {
        font-size: 1.75rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .main-content {
        padding: var(--spacing-xl) var(--spacing-md);
    }
    
    .input-card,
    .claims-card {
        padding: var(--spacing-md);
    }
    
    .card-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-md);
    }
    
    .card-actions {
        width: 100%;
    }
    
    .card-actions .btn {
        flex: 1;
        justify-content: center;
    }
    
    .token-parts {
        grid-template-columns: 1fr;
    }
    
    .info-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
    
    .footer-links {
        justify-content: center;
    }
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-gray-100);
    border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb {
    background: var(--color-gray-300);
    border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-gray-400);
}

/* Focus States */
button:focus-visible,
a:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Loading State */
.loading {
    pointer-events: none;
    opacity: 0.7;
}

.loading .btn-primary {
    position: relative;
}

.loading .btn-primary::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    border: 2px solid var(--color-white);
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    right: var(--spacing-md);
}

@keyframes spin {
    to { transform: rotate(360deg); }
}