/* ============================================
   CheckApp — Common Styles
   ============================================ */

/* --- CSS Variables --- */
:root {
    /* Backgrounds */
    --color-bg-darkest:    #0a0a0a;
    --color-bg-dark:       #111111;
    --color-bg-base:       #161616;
    --color-bg-elevated:   #1c1c1c;
    --color-bg-surface:    #242424;
    --color-bg-hover:      #2c2c2c;
    --color-bg-active:     #333333;

    /* Text */
    --color-text-primary:   #f0f0f0;
    --color-text-secondary: #a0a0a0;
    --color-text-muted:     #666666;

    /* Borders */
    --color-border:         #2a2a2a;
    --color-border-hover:   #444444;

    /* Accent (green) */
    --color-accent:         #22c55e;
    --color-accent-hover:   #16a34a;
    --color-accent-glow:    rgba(34, 197, 94, 0.25);

    /* Semantic */
    --color-danger:         #ef4444;
    --color-danger-hover:   #dc2626;
    --color-danger-bg:      #2d1f1f;
    --color-danger-border:  #5c3333;
    --color-info:           #3b82f6;
    --color-info-bg:        #1f2a2d;
    --color-info-border:    #33475c;
    --color-warning:        #f59e0b;
    --color-purple:         #8b5cf6;
    --color-success-bg:     #1f2d1f;
    --color-success-border: #335c33;
    --color-success-text:   #6bff6b;
    --color-danger-text:    #ff6b6b;
    --color-info-text:      #6bb4ff;

    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --font-size-sm: 0.85rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.3rem;
    --font-size-xl: 1.5rem;
    --font-size-2xl: 1.8rem;

    /* Spacing */
    --spacing-xs: 0.3rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 2.5rem;

    /* Radii */
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
    --radius-xl: 12px;

    /* Shadows */
    --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.5);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.6);

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

/* --- Reset --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* --- Body --- */
body {
    font-family: var(--font-family);
    background: var(--color-bg-darkest);
    color: var(--color-text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

/* --- Header (frosted glass) --- */
.header {
    background: rgba(10, 10, 10, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    padding: 1.2rem var(--spacing-xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header h1 {
    color: #ffffff;
    font-size: var(--font-size-2xl);
    font-weight: 600;
    letter-spacing: 0.5px;
}

/* --- Container --- */
.container {
    max-width: 1400px;
    margin: var(--spacing-xl) auto;
    padding: 0 var(--spacing-xl);
}

/* --- Forms --- */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 0.75rem;
    background: var(--color-bg-surface);
    border: 1px solid var(--color-border-hover);
    border-radius: var(--radius-md);
    color: #ffffff;
    font-size: var(--font-size-base);
    transition: border-color var(--transition-normal), box-shadow var(--transition-normal), background var(--transition-normal);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-accent);
    background: var(--color-bg-active);
    box-shadow: 0 0 0 3px var(--color-accent-glow);
}

/* --- Buttons: base --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-weight: 600;
    font-size: var(--font-size-base);
    padding: 0.9rem 1.5rem;
    transition: all var(--transition-normal);
    text-decoration: none;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}

/* --- Button modifiers --- */
.btn--accent {
    background: var(--color-accent);
    color: white;
}

.btn--accent:hover:not(:disabled) {
    background: var(--color-accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--color-accent-glow);
}

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

.btn--danger:hover:not(:disabled) {
    background: var(--color-danger-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

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

.btn--info:hover:not(:disabled) {
    background: #2563eb;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

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

.btn--purple:hover:not(:disabled) {
    background: #7c3aed;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(139, 92, 246, 0.3);
}

.btn--secondary {
    background: #6c757d;
    color: white;
}

.btn--secondary:hover:not(:disabled) {
    background: #5a6268;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(108, 117, 125, 0.3);
}

.btn--warning {
    background: var(--color-warning);
    color: #000;
}

.btn--warning:hover:not(:disabled) {
    background: #d97706;
    transform: translateY(-1px);
}

.btn--sm {
    padding: 0.4rem 0.8rem;
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.btn--full {
    width: 100%;
}

/* --- Legacy button classes (backwards compat during transition) --- */
.btn-primary {
    width: 100%;
    background: var(--color-accent);
    color: white;
    border: none;
    padding: 0.9rem;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: var(--font-size-base);
    font-weight: 600;
    transition: all var(--transition-normal);
    margin-top: var(--spacing-md);
}

.btn-primary:hover {
    background: var(--color-accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--color-accent-glow);
}

/* --- Messages --- */
.message {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
    font-weight: 500;
    animation: fadeIn 0.3s ease;
}

.message.error {
    background: var(--color-danger-bg);
    color: var(--color-danger-text);
    border: 1px solid var(--color-danger-border);
}

.message.success {
    background: var(--color-success-bg);
    color: var(--color-success-text);
    border: 1px solid var(--color-success-border);
}

.message.info {
    background: var(--color-info-bg);
    color: var(--color-info-text);
    border: 1px solid var(--color-info-border);
}

/* --- Loading / Spinner --- */
.loading {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--color-text-muted);
    font-size: 1.1rem;
}

.spinner {
    border: 3px solid var(--color-bg-active);
    border-top: 3px solid var(--color-accent);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--spacing-md);
}

/* --- Tables (base) --- */
table {
    width: 100%;
    border-collapse: collapse;
}

/* --- Hidden --- */
.hidden {
    display: none !important;
}

/* --- Modal base --- */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-normal);
}

.modal.show {
    opacity: 1;
    pointer-events: auto;
}

.modal-content {
    background: var(--color-bg-elevated);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border);
    max-width: 500px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    transform: translateY(20px) scale(0.97);
    transition: transform var(--transition-normal);
    box-shadow: var(--shadow-lg);
}

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

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

.modal-header h2 {
    color: #ffffff;
    font-size: var(--font-size-xl);
}

.close-btn {
    background: none;
    border: none;
    color: var(--color-text-muted);
    font-size: 2rem;
    cursor: pointer;
    padding: 0;
    line-height: 1;
    transition: color var(--transition-fast);
}

.close-btn:hover {
    color: #ffffff;
}

/* --- Animations --- */
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* --- Responsive --- */
@media (max-width: 768px) {
    :root {
        --font-size-2xl: 1.4rem;
        --font-size-xl: 1.2rem;
        --font-size-lg: 1.1rem;
    }

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

    .container {
        padding: 0 var(--spacing-md);
    }
}