/**
 * Main Stylesheet
 * Aariya SkillTech - Invoice Management System
 */

/* ===========================
   GLOBAL STYLES
   =========================== */

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

:root {
    --primary-color: #667eea;
    --primary-dark: #5568d3;
    --secondary-color: #764ba2;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #17a2b8;
    --dark-color: #2c3e50;
    --light-color: #f8f9fa;
    --sidebar-width: 260px;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background: #f5f5f5;
}

/* ===========================
   LOGIN PAGE
   =========================== */

.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-container {
    width: 100%;
    max-width: 420px;
    padding: 20px;
}

.login-box {
    background: white;
    border-radius: 10px;
    padding: 40px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

.logo-container {
    text-align: center;
    margin-bottom: 20px;
}

.login-logo {
    width: 120px;
    height: 120px;
    border-radius: 10px;
    border: 3px solid var(--primary-color);
    padding: 10px;
    background: white;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.login-box h1 {
    text-align: center;
    color: var(--primary-color);
    margin-bottom: 10px;
    font-size: 24px;
}

.login-box h2 {
    text-align: center;
    color: #666;
    margin-bottom: 30px;
    font-size: 16px;
    font-weight: normal;
}

.login-form .form-group {
    margin-bottom: 20px;
}

.login-form label {
    display: block;
    margin-bottom: 5px;
    color: #555;
    font-weight: 600;
}

.login-form input {
    width: 100%;
    padding: 12px;
    border: 2px solid #ddd;
    border-radius: 5px;
    font-size: 14px;
    transition: border-color 0.3s;
}

.login-form input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.login-footer {
    text-align: center;
    margin-top: 20px;
    color: #666;
    font-size: 13px;
}

.login-footer p {
    margin: 5px 0;
}

/* ===========================
   DASHBOARD LAYOUT
   =========================== */

.dashboard {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background: linear-gradient(180deg, #2c3e50 0%, #34495e 100%);
    color: white;
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
}

.sidebar-header {
    padding: 30px 20px;
    text-align: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-logo {
    width: 90px;
    height: 90px;
    border-radius: 10px;
    margin-bottom: 15px;
    border: 3px solid white;
    padding: 8px;
    background: white;
    box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

.sidebar-header h3 {
    font-size: 18px;
    margin: 0;
}

.sidebar-nav {
    flex: 1;
    padding: 20px 0;
}

.nav-link {
    display: flex;
    align-items: center;
    padding: 15px 25px;
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: all 0.3s;
    border-left: 3px solid transparent;
}

.nav-link:hover,
.nav-link.active {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border-left-color: var(--primary-color);
}

.nav-link .icon {
    margin-right: 12px;
    font-size: 20px;
}

.sidebar-footer {
    padding: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    font-size: 13px;
}

/* Main Content */
.main-content {
    margin-left: var(--sidebar-width);
    flex: 1;
    padding: 30px;
    width: calc(100% - var(--sidebar-width));
}

.content-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.content-header h1 {
    color: var(--dark-color);
    font-size: 28px;
}

/* ===========================
   ALERTS
   =========================== */

.alert {
    padding: 15px 20px;
    border-radius: 5px;
    margin-bottom: 20px;
    font-size: 14px;
}

.alert ul {
    margin: 0;
    padding-left: 20px;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.alert-info {
    background: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}

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

.card {
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    margin-bottom: 30px;
}

.card-header {
    padding: 20px 25px;
    border-bottom: 1px solid #e9ecef;
}

.card-header h2 {
    color: var(--dark-color);
    font-size: 20px;
    margin-bottom: 5px;
}

.card-header p {
    color: #6c757d;
    margin: 0;
    font-size: 14px;
}

.card-body {
    padding: 25px;
}

/* ===========================
   BUTTONS
   =========================== */

.btn {
    display: inline-block;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s;
    text-align: center;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

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

.btn-secondary:hover {
    background: #5a6268;
}

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

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

.btn-warning {
    background: var(--warning-color);
    color: #212529;
}

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

.btn-sm {
    padding: 6px 12px;
    font-size: 12px;
}

.btn-lg {
    padding: 14px 28px;
    font-size: 16px;
}

.btn-block {
    display: block;
    width: 100%;
}

/* ===========================
   FORMS
   =========================== */

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #495057;
    font-weight: 600;
    font-size: 14px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 2px solid #dee2e6;
    border-radius: 5px;
    font-size: 14px;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-group small {
    display: block;
    margin-top: 5px;
    color: #6c757d;
    font-size: 12px;
}

.readonly-input {
    background: #e9ecef;
    cursor: not-allowed;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-actions {
    display: flex;
    gap: 15px;
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid #e9ecef;
}

/* ===========================
   TABLES
   =========================== */

.table-responsive {
    overflow-x: auto;
}

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.table thead {
    background: var(--dark-color);
    color: white;
}

.table th,
.table td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid #dee2e6;
}

.table tbody tr:hover {
    background: #f8f9fa;
}

.table .actions {
    white-space: nowrap;
}

.table .actions .btn {
    margin-right: 5px;
    margin-bottom: 5px;
}

/* ===========================
   EMPTY STATE
   =========================== */

.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: #6c757d;
}

.empty-state p {
    font-size: 16px;
    margin-bottom: 20px;
}

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

@media (max-width: 768px) {
    .sidebar {
        width: 100%;
        position: relative;
        height: auto;
    }
    
    .main-content {
        margin-left: 0;
        width: 100%;
        padding: 20px;
    }
    
    .content-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .table-responsive {
        overflow-x: scroll;
    }
    
    .table {
        min-width: 600px;
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .form-actions .btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .login-box {
        padding: 30px 20px;
    }
    
    .card-body {
        padding: 15px;
    }
    
    .btn-sm {
        padding: 5px 10px;
        font-size: 11px;
    }
}

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

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

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

.mt-20 {
    margin-top: 20px;
}

.mb-20 {
    margin-bottom: 20px;
}

.p-20 {
    padding: 20px;
}