/* ==========================================
   PREMIUM PAYROLL SYSTEM - CSS
   Ultra-Modern Design with Glassmorphism
   ========================================== */

:root {
    /* Primary Color Palette - Deep Ocean Blues */
    --primary: #0a4d68;
    --primary-light: #088395;
    --primary-dark: #05161a;
    --accent: #00d9ff;
    --accent-glow: rgba(0, 217, 255, 0.4);
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #0a4d68 0%, #088395 100%);
    --gradient-accent: linear-gradient(135deg, #00d9ff 0%, #05ffa1 100%);
    --gradient-card: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.05) 100%);
    
    /* Neutrals */
    --bg-primary: #0a0e27;
    --bg-secondary: #151934;
    --bg-tertiary: #1e2749;
    --surface: rgba(255, 255, 255, 0.05);
    --surface-hover: rgba(255, 255, 255, 0.1);
    
    /* Text Colors */
    --text-primary: #ffffff;
    --text-secondary: #b4c5e4;
    --text-tertiary: #7c88a1;
    
    /* Status Colors */
    --success: #05ffa1;
    --warning: #ffb800;
    --error: #ff3860;
    --info: #00d9ff;
    
    /* Shadows & Effects */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 40px var(--accent-glow);
    
    /* Borders */
    --border-radius: 16px;
    --border-radius-sm: 8px;
    --border-radius-lg: 24px;
    --border: 1px solid rgba(255, 255, 255, 0.1);
    
    /* Spacing */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;
    
    /* Typography */
    --font-primary: 'Outfit', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
}

/* ==========================================
   GLOBAL RESET & BASE STYLES
   ========================================== */

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

body {
    font-family: var(--font-primary);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
    position: relative;
}

/* ==========================================
   ANIMATED BACKGROUND
   ========================================== */

.background-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.6;
    animation: float 20s ease-in-out infinite;
}

.orb-1 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(8, 131, 149, 0.4) 0%, transparent 70%);
    top: -250px;
    left: -250px;
    animation-delay: 0s;
}

.orb-2 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(0, 217, 255, 0.3) 0%, transparent 70%);
    top: 50%;
    right: -200px;
    animation-delay: 7s;
}

.orb-3 {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(5, 255, 161, 0.2) 0%, transparent 70%);
    bottom: -300px;
    left: 30%;
    animation-delay: 14s;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    33% {
        transform: translate(30px, -30px) scale(1.1);
    }
    66% {
        transform: translate(-20px, 20px) scale(0.9);
    }
}

.grid-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: 50px 50px;
    opacity: 0.5;
}

/* ==========================================
   CONTAINER & LAYOUT
   ========================================== */

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-md);
    position: relative;
    z-index: 1;
}

/* ==========================================
   HEADER
   ========================================== */

.header {
    margin-bottom: var(--spacing-xl);
    animation: fadeInDown 0.8s ease-out;
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    background: var(--surface);
    border: var(--border);
    border-radius: var(--border-radius-lg);
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-lg);
}

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

.logo-icon {
    width: 56px;
    height: 56px;
    background: var(--gradient-accent);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-glow);
    animation: pulse 3s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        box-shadow: 0 0 20px var(--accent-glow);
    }
    50% {
        transform: scale(1.05);
        box-shadow: 0 0 40px var(--accent-glow);
    }
}

.logo-icon svg {
    width: 28px;
    height: 28px;
    color: var(--bg-primary);
}

.logo-text h1 {
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    margin: 0;
}

.logo-text h1 .highlight {
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tagline {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin: 0;
    font-weight: 500;
    letter-spacing: 0.5px;
}

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

.icon-btn {
    width: 48px;
    height: 48px;
    border-radius: var(--border-radius);
    border: var(--border);
    background: var(--surface);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.icon-btn:hover {
    background: var(--surface-hover);
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.icon-btn svg {
    width: 20px;
    height: 20px;
}

/* ==========================================
   DASHBOARD STATS GRID
   ========================================== */

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.stat-card {
    position: relative;
    padding: var(--spacing-lg);
    background: var(--surface);
    border: var(--border);
    border-radius: var(--border-radius-lg);
    backdrop-filter: blur(20px);
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    animation: fadeInUp 0.8s ease-out backwards;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-card);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.stat-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--accent);
}

.stat-card:hover::before {
    opacity: 1;
}

.card-1 {
    animation-delay: 0.1s;
}

.card-2 {
    animation-delay: 0.2s;
}

.card-3 {
    animation-delay: 0.3s;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.stat-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--border-radius);
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-sm);
    position: relative;
    z-index: 1;
}

.stat-icon svg {
    width: 28px;
    height: 28px;
    color: white;
}

.stat-content {
    position: relative;
    z-index: 1;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 800;
    font-family: var(--font-mono);
    margin-bottom: var(--spacing-sm);
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-change {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.875rem;
    font-weight: 500;
}

.stat-change svg {
    width: 16px;
    height: 16px;
}

.stat-change.positive {
    color: var(--success);
}

.stat-change.neutral {
    color: var(--info);
}

/* ==========================================
   SECTION CARDS
   ========================================== */

.section-card {
    background: var(--surface);
    border: var(--border);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-lg);
    animation: fadeInUp 0.8s ease-out backwards;
}

.add-employee-section {
    animation-delay: 0.4s;
}

.employee-list-section {
    animation-delay: 0.5s;
}

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

.section-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.section-title svg {
    width: 28px;
    height: 28px;
    color: var(--accent);
}

/* ==========================================
   FORM STYLES
   ========================================== */

.employee-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

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

.form-group label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-group input {
    padding: 16px 20px;
    background: var(--bg-secondary);
    border: var(--border);
    border-radius: var(--border-radius);
    color: var(--text-primary);
    font-size: 1rem;
    font-family: var(--font-primary);
    transition: all 0.3s ease;
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent);
    background: var(--bg-tertiary);
    box-shadow: 0 0 0 4px rgba(0, 217, 255, 0.1);
}

.form-group input::placeholder {
    color: var(--text-tertiary);
}

.submit-btn {
    padding: 18px 32px;
    background: var(--gradient-accent);
    border: none;
    border-radius: var(--border-radius);
    color: var(--bg-primary);
    font-size: 1rem;
    font-weight: 700;
    font-family: var(--font-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    transition: all 0.3s ease;
    box-shadow: var(--shadow-glow);
    align-self: flex-start;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 60px var(--accent-glow);
}

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

.submit-btn svg {
    width: 20px;
    height: 20px;
}

/* ==========================================
   SEARCH BOX
   ========================================== */

.search-box {
    position: relative;
    max-width: 400px;
}

.search-box svg {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    height: 20px;
    color: var(--text-tertiary);
    pointer-events: none;
}

.search-box input {
    width: 100%;
    padding: 14px 20px 14px 48px;
    background: var(--bg-secondary);
    border: var(--border);
    border-radius: var(--border-radius);
    color: var(--text-primary);
    font-size: 0.95rem;
    font-family: var(--font-primary);
    transition: all 0.3s ease;
}

.search-box input:focus {
    outline: none;
    border-color: var(--accent);
    background: var(--bg-tertiary);
    box-shadow: 0 0 0 4px rgba(0, 217, 255, 0.1);
}

.search-box input::placeholder {
    color: var(--text-tertiary);
}

/* ==========================================
   TABLE STYLES
   ========================================== */

.table-container {
    overflow-x: auto;
    border-radius: var(--border-radius);
    background: var(--bg-secondary);
    border: var(--border);
}

.employee-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
}

.employee-table thead {
    background: var(--bg-tertiary);
    position: sticky;
    top: 0;
    z-index: 10;
}

.employee-table thead tr th {
    padding: 20px 16px;
    text-align: left;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
    border-bottom: var(--border);
}

.employee-table tbody tr {
    background: var(--bg-secondary);
    transition: all 0.3s ease;
    border-bottom: var(--border);
}

.employee-table tbody tr:hover {
    background: var(--bg-tertiary);
    transform: scale(1.01);
}

.employee-table tbody tr td {
    padding: 20px 16px;
    color: var(--text-primary);
    font-size: 0.95rem;
    border-bottom: var(--border);
}

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

.employee-table tbody tr td:first-child {
    font-family: var(--font-mono);
    font-weight: 600;
    color: var(--accent);
}

.employee-table tbody tr td:nth-child(4),
.employee-table tbody tr td:nth-child(5),
.employee-table tbody tr td:nth-child(6),
.employee-table tbody tr td:nth-child(7),
.employee-table tbody tr td:nth-child(8) {
    font-family: var(--font-mono);
    font-weight: 500;
}

.employee-table tbody tr td:last-child {
    display: flex;
    gap: var(--spacing-xs);
    border-bottom: none;
}

/* Action Buttons */
.employee-table button {
    padding: 8px 16px;
    border: none;
    border-radius: var(--border-radius-sm);
    font-size: 0.875rem;
    font-weight: 600;
    font-family: var(--font-primary);
    cursor: pointer;
    transition: all 0.3s ease;
}

.employee-table button:first-child {
    background: var(--gradient-primary);
    color: white;
}

.employee-table button:first-child:hover {
    box-shadow: 0 4px 16px rgba(8, 131, 149, 0.4);
    transform: translateY(-2px);
}

.employee-table button:last-child {
    background: rgba(255, 56, 96, 0.1);
    color: var(--error);
    border: 1px solid rgba(255, 56, 96, 0.3);
}

.employee-table button:last-child:hover {
    background: var(--error);
    color: white;
    box-shadow: 0 4px 16px rgba(255, 56, 96, 0.4);
    transform: translateY(-2px);
}

/* ==========================================
   MODAL STYLES
   ========================================== */

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
    animation: fadeIn 0.3s ease-out;
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 14, 39, 0.9);
    backdrop-filter: blur(10px);
}

.modal-content {
    position: relative;
    background: var(--bg-secondary);
    border: var(--border);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    animation: slideUp 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1001;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    width: 40px;
    height: 40px;
    border-radius: var(--border-radius);
    border: var(--border);
    background: var(--surface);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.modal-close:hover {
    background: var(--error);
    border-color: var(--error);
    transform: rotate(90deg);
}

.modal-close svg {
    width: 20px;
    height: 20px;
}

/* ==========================================
   RESPONSIVE DESIGN
   ========================================== */

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

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

    .logo-text h1 {
        font-size: 1.5rem;
    }

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

    .stat-value {
        font-size: 2rem;
    }

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

    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-md);
    }

    .search-box {
        max-width: 100%;
    }

    .table-container {
        border-radius: var(--border-radius-sm);
    }

    .employee-table {
        font-size: 0.85rem;
    }

    .employee-table thead tr th,
    .employee-table tbody tr td {
        padding: 12px 8px;
    }
}

/* ==========================================
   SCROLLBAR STYLING
   ========================================== */

::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--surface);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--surface-hover);
}

/* ==========================================
   LOADING ANIMATION
   ========================================== */

@keyframes shimmer {
    0% {
        background-position: -1000px 0;
    }
    100% {
        background-position: 1000px 0;
    }
}

.loading {
    animation: shimmer 2s infinite linear;
    background: linear-gradient(
        90deg,
        var(--surface) 0%,
        var(--surface-hover) 50%,
        var(--surface) 100%
    );
    background-size: 1000px 100%;
}

/* ==========================================
   UTILITY CLASSES
   ========================================== */

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

.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }

.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }