/* ============================================================================
   HOURS APPROVAL SYSTEM - COMMON STYLES
   Modern Design System
   ============================================================================ */

/* ============================================================================
   CSS VARIABLES - DESIGN TOKENS
   ============================================================================ */
:root {
    /* Brand Colors */
    --color-primary: #2563eb;           /* Blue for primary actions */
    --color-primary-hover: #1d4ed8;
    --color-primary-light: #5376d6;
    --color-primary-dark: #1e40af;

    /* Semantic Colors */
    --color-success: #10b981;           /* Green for approve/add */
    --color-success-hover: #059669;
    --color-success-light: #d1fae5;
    --color-success-dark: #065f46;

    --color-warning: #f59e0b;           /* Orange for edit/reset */
    --color-warning-hover: #d97706;
    --color-warning-light: #fef3c7;
    --color-warning-dark: #92400e;

    --color-yellow: #eab308;            /* Yellow for edit */
    --color-yellow-hover: #ca8a04;
    --color-yellow-light: #fef9c3;
    --color-yellow-dark: #854d0e;

    --color-danger: #ef4444;            /* Red for delete */
    --color-danger-hover: #dc2626;
    --color-danger-light: #fee2e2;
    --color-danger-dark: #991b1b;

    --color-info: #06b6d4;              /* Cyan for info */
    --color-info-hover: #0891b2;
    --color-info-light: #cffafe;
    --color-info-dark: #164e63;

    /* Neutral Colors */
    --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;

    /* Text Colors */
    --color-text-primary: #111827;
    --color-text-secondary: #4b5563;
    --color-text-muted: #9ca3af;

    /* Background Colors */
    --color-bg-primary: #ffffff;
    --color-bg-secondary: #f9fafb;
    --color-bg-tertiary: #f3f4f6;

    /* Border Colors */
    --color-border-light: #f3f4f6;
    --color-border: #e5e7eb;
    --color-border-medium: #d1d5db;
    --color-border-dark: #9ca3af;

    /* Spacing Scale */
    --space-1: 0.25rem;    /* 4px */
    --space-2: 0.5rem;     /* 8px */
    --space-3: 0.75rem;    /* 12px */
    --space-4: 1rem;       /* 16px */
    --space-5: 1.25rem;    /* 20px */
    --space-6: 1.5rem;     /* 24px */
    --space-8: 2rem;       /* 32px */
    --space-10: 2.5rem;    /* 40px */
    --space-12: 3rem;      /* 48px */

    /* Border Radius */
    --radius-sm: 0.25rem;   /* 4px */
    --radius-md: 0.375rem;  /* 6px */
    --radius-lg: 0.5rem;    /* 8px */
    --radius-xl: 0.75rem;   /* 12px */
    --radius-full: 9999px;

    /* Shadows */
    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --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 cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);

    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;
}

/* ============================================================================
   RESET & BASE STYLES
   ============================================================================ */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    font-size: 0.875rem;
    line-height: var(--line-height-normal);
    color: var(--color-text-primary);
    background: var(--color-bg-secondary);
}

/* ============================================================================
   LAYOUT
   ============================================================================ */
.container {
    max-width: 1600px;
    margin: 0 auto;
    padding: var(--space-6);
}

/* ============================================================================
   TYPOGRAPHY
   ============================================================================ */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-semibold);
    line-height: var(--line-height-tight);
    color: var(--color-text-primary);
}

h1 {
    font-size: 1.875rem;
    margin-bottom: var(--space-4);
}

h2 {
    font-size: 1.5rem;
}

h3 {
    font-size: 1.25rem;
}

h4 {
    font-size: 1rem;
}

/* ============================================================================
   HEADER
   ============================================================================ */
.header {
    background: var(--color-bg-primary);
    padding: var(--space-6);
    margin-bottom: var(--space-6);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
}

.header__title {
    font-size: 1.875rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
    margin-bottom: var(--space-5);
}

/* ============================================================================
   NAVIGATION TABS
   ============================================================================ */
.nav-tabs {
    display: flex;
    gap: var(--space-2);
    border-bottom: 2px solid var(--color-border);
    margin-bottom: var(--space-6);
}

.nav-tabs__link {
    padding: var(--space-3) var(--space-5);
    text-decoration: none;
    color: var(--color-text-secondary);
    font-weight: var(--font-weight-medium);
    border-bottom: 2px solid transparent;
    transition: all var(--transition-base);
    position: relative;
    bottom: -2px;
}

.nav-tabs__link:hover {
    color: var(--color-text-primary);
    background: var(--color-gray-50);
    border-radius: var(--radius-md) var(--radius-md) 0 0;
}

.nav-tabs__link--active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}

/* ============================================================================
   FILTERS
   ============================================================================ */
.filters {
    display: flex;
    gap: var(--space-4);
    align-items: flex-end;
    flex-wrap: wrap;
    background: var(--color-bg-tertiary);
    padding: var(--space-5);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-6);
}

.filters--grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    align-items: flex-end;
}

.filters--grid .filter-actions {
    align-self: end;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    min-width: 180px;
}

.filter-group__label {
    font-size: 0.75rem;
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.filter-actions {
    display: flex;
    gap: var(--space-3);
    margin-left: auto;
    align-items: flex-end;
}

/* ============================================================================
   FORM CONTROLS
   ============================================================================ */
input[type="text"],
input[type="date"],
input[type="time"],
input[type="email"],
input[type="number"],
select,
textarea {
    width: 100%;
    padding: var(--space-2) var(--space-3);
    font-size: 0.875rem;
    font-family: var(--font-sans);
    color: var(--color-text-primary);
    background: var(--color-bg-primary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-light);
}

input:disabled,
select:disabled,
textarea:disabled {
    background: var(--color-gray-100);
    color: var(--color-text-muted);
    cursor: not-allowed;
    opacity: 0.6;
}

input[type="checkbox"] {
    width: 1rem;
    height: 1rem;
    cursor: pointer;
    accent-color: var(--color-primary);
}

/* ============================================================================
   BUTTONS
   ============================================================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
    font-family: var(--font-sans);
    line-height: 1.5;
    text-decoration: none;
    color: var(--color-text-primary);
    background: var(--color-bg-primary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
}

.btn:hover {
    background: var(--color-gray-50);
    border-color: var(--color-border-medium);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

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

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* Button Variants */
.btn--primary {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

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

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

.btn--success:hover {
    background: var(--color-success-hover);
    border-color: var(--color-success-hover);
}

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

.btn--warning:hover {
    background: var(--color-warning-hover);
    border-color: var(--color-warning-hover);
}

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

.btn--yellow:hover {
    background: var(--color-yellow-hover);
    border-color: var(--color-yellow-hover);
}

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

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

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

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

/* Button Sizes */
.btn--sm {
    padding: var(--space-1) var(--space-2);
    font-size: 0.75rem;
}

.btn--lg {
    padding: var(--space-3) var(--space-6);
    font-size: 1rem;
}

/* ============================================================================
   BADGES
   ============================================================================ */
.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-1) var(--space-2);
    font-size: 0.75rem;
    font-weight: var(--font-weight-semibold);
    border-radius: var(--radius-sm);
    line-height: 1;
}

.badge--neutral {
    background: var(--color-gray-100);
    color: var(--color-gray-700);
}

.badge--type {
    background: var(--color-gray-100);
    color: var(--color-gray-700);
    margin-left: var(--space-2);
}

.badge--manual {
    background: var(--color-info-light);
    color: var(--color-info-dark);
    margin-left: var(--space-2);
}

/* ============================================================================
   CARDS
   ============================================================================ */
.card {
    background: var(--color-bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.card__header {
    padding: var(--space-5);
    border-bottom: 1px solid var(--color-border);
}

.card__body {
    padding: var(--space-5);
}

.card__footer {
    padding: var(--space-5);
    border-top: 1px solid var(--color-border);
    background: var(--color-bg-secondary);
}

/* Week Navigation Card */
.week-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--color-bg-primary);
    padding: var(--space-5) var(--space-6);
    margin-bottom: var(--space-6);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
}

.week-nav__title {
    font-size: 1.25rem;
    font-weight: var(--font-weight-semibold);
}

.week-nav__buttons {
    display: flex;
    gap: var(--space-3);
}

/* ============================================================================
   TABLES
   ============================================================================ */
.table-container {
    background: var(--color-bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

table {
    width: 100%;
    border-collapse: collapse;
}

thead th {
    padding: var(--space-3) var(--space-2);
    font-size: 0.75rem;
    font-weight: var(--font-weight-semibold);
    text-align: left;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-secondary);
    background: var(--color-gray-50);
    border-bottom: 2px solid var(--color-border);
}

thead th.th--center {
    text-align: center;
}

tbody td {
    padding: var(--space-2) var(--space-3);
    font-size: 0.875rem;
    border-bottom: 1px solid var(--color-border-light);
    background: var(--color-bg-primary);
}

tbody tr:hover td {
    background: var(--color-gray-50);
}

/* Exclude detail rows from hover effect */
tbody tr.detail-row:hover td {
    background: transparent;
}

tbody tr:last-child td {
    border-bottom: none;
}

.td--center {
    text-align: center;
}

.td--nowrap {
    white-space: nowrap;
}

.td--bold {
    font-weight: var(--font-weight-semibold);
}

/* ============================================================================
   STATS GRID
   ============================================================================ */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-5);
    margin-bottom: var(--space-6);
}

.stat-card {
    background: var(--color-bg-primary);
    padding: var(--space-6);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
}

.stat-card__label {
    font-size: 0.75rem;
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-2);
}

.stat-card__value {
    font-size: 2rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
}

/* ============================================================================
   MODAL
   ============================================================================ */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    padding: var(--space-4);
}

.modal__content {
    background: var(--color-bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    padding: var(--space-8);
}

.modal__header {
    margin-bottom: var(--space-6);
}

.modal__title {
    font-size: 1.5rem;
    font-weight: var(--font-weight-semibold);
}

.modal__body {
    margin-bottom: var(--space-6);
}

.modal__footer {
    display: flex;
    gap: var(--space-3);
    justify-content: flex-end;
}

/* ============================================================================
   FORM LAYOUTS
   ============================================================================ */
.form-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
    margin-bottom: var(--space-4);
}

.form-grid--single {
    grid-template-columns: 1fr;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.form-group__label {
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
}

.form-actions {
    display: flex;
    gap: var(--space-3);
    margin-top: var(--space-4);
}

/* ============================================================================
   UTILITY CLASSES
   ============================================================================ */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-left { text-align: left; }

.text-muted { color: var(--color-text-muted); }
.text-secondary { color: var(--color-text-secondary); }
.text-primary { color: var(--color-text-primary); }

.text-success { color: var(--color-success-dark); }
.text-warning { color: var(--color-warning-dark); }
.text-danger { color: var(--color-danger); }

.font-medium { font-weight: var(--font-weight-medium); }
.font-semibold { font-weight: var(--font-weight-semibold); }
.font-bold { font-weight: var(--font-weight-bold); }

.hidden { display: none !important; }
.visible { display: block !important; }

.ml-auto { margin-left: auto; }
.mr-auto { margin-right: auto; }

/* ============================================================================
   HTMX TRANSITIONS
   ============================================================================ */
.htmx-swapping {
    opacity: 0;
    transition: opacity var(--transition-base);
}

.htmx-settling {
    opacity: 1;
}

/* ============================================================================
   RESPONSIVE
   ============================================================================ */
@media (max-width: 768px) {
    .container {
        padding: var(--space-4);
    }

    .filters {
        flex-direction: column;
        align-items: stretch;
    }

    .filter-actions {
        margin-left: 0;
        flex-direction: column;
    }

    .form-grid {
        grid-template-columns: 1fr;
    }

    .week-nav {
        flex-direction: column;
        gap: var(--space-4);
        text-align: center;
    }
}