/* ========================================
   SHAMI TRADER - Client Management System
   Complete Stylesheet
   ======================================== */

/* Google Font Import */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

/* Root Variables */
:root {
    --primary-color: #1e293b;
    --secondary-color: #3b82f6;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --info-color: #06b6d4;
    --purple-color: #8b5cf6;
    --light-bg: #f1f5f9;
    --dark-text: #334155;
    --muted-text: #94a3b8;
    --border-color: #e2e8f0;
    --border-radius: 10px;
    --border-radius-sm: 6px;
    --box-shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
    --box-shadow-lg: 0 10px 25px rgba(0,0,0,0.1);
    --sidebar-width: 260px;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--light-bg);
    color: var(--dark-text);
    min-height: 100vh;
    line-height: 1.6;
}

a {
    color: var(--secondary-color);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* ========================================
   LOGIN PAGE
   ======================================== */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-box {
    background: white;
    padding: 40px;
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.2);
    width: 100%;
    max-width: 420px;
}

.login-logo {
    text-align: center;
    margin-bottom: 10px;
}

.login-logo i {
    font-size: 50px;
    color: var(--secondary-color);
    background: linear-gradient(135deg, #667eea, #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.login-box h2 {
    text-align: center;
    color: var(--primary-color);
    margin-bottom: 5px;
    font-size: 28px;
    font-weight: 700;
}

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

.input-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--dark-text);
    font-weight: 500;
    font-size: 14px;
}

.input-group input {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 15px;
    transition: all 0.3s;
    font-family: inherit;
}

.input-group input:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.login-btn {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    font-family: inherit;
}

.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.4);
}

.login-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

/* ========================================
   DASHBOARD LAYOUT
   ======================================== */
.dashboard {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background: var(--primary-color);
    color: white;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    z-index: 1000;
    transition: transform 0.3s ease;
}

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

.sidebar-header h3 {
    text-align: center;
    font-size: 20px;
    font-weight: 700;
    letter-spacing: 1px;
}

.sidebar-menu {
    list-style: none;
    padding: 15px 10px;
}

.sidebar-menu li {
    margin-bottom: 5px;
}

.sidebar-menu a {
    color: rgba(255,255,255,0.7);
    text-decoration: none;
    padding: 12px 18px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-radius: var(--border-radius-sm);
    transition: all 0.2s;
    font-weight: 500;
    font-size: 14px;
}

.sidebar-menu a:hover {
    color: white;
    background: rgba(255,255,255,0.1);
    text-decoration: none;
}

.sidebar-menu a.active {
    color: white;
    background: var(--secondary-color);
}

.sidebar-menu i {
    width: 20px;
    text-align: center;
    font-size: 16px;
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 20px;
    min-height: 100vh;
}

/* Mobile toggle button */
.mobile-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 20px;
    color: var(--dark-text);
    cursor: pointer;
    padding: 5px;
}

/* ========================================
   HEADER
   ======================================== */
.header {
    background: white;
    padding: 18px 25px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    margin-bottom: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header h1 {
    color: var(--primary-color);
    font-size: 22px;
    font-weight: 700;
}

.header h1 i {
    margin-right: 8px;
    color: var(--secondary-color);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 15px;
}

.user-info span {
    color: var(--dark-text);
    font-weight: 500;
    font-size: 14px;
}

.logout-btn {
    padding: 8px 16px;
    background: var(--danger-color);
    color: white;
    border: none;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    font-weight: 500;
    font-size: 13px;
    transition: all 0.2s;
    font-family: inherit;
}

.logout-btn:hover {
    background: #dc2626;
    transform: translateY(-1px);
}

/* ========================================
   STATS CARDS
   ======================================== */
.stats-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-bottom: 25px;
}

.stat-card {
    background: white;
    padding: 22px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-left: 4px solid var(--secondary-color);
    transition: transform 0.2s, box-shadow 0.2s;
}

.stat-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--box-shadow-lg);
}

.stat-card-blue { border-left-color: var(--secondary-color); }
.stat-card-green { border-left-color: var(--success-color); }
.stat-card-red { border-left-color: var(--danger-color); }
.stat-card-purple { border-left-color: var(--purple-color); }

.stat-info h3 {
    font-size: 13px;
    color: var(--muted-text);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
}

.stat-info .number {
    font-size: 26px;
    font-weight: 700;
    color: var(--primary-color);
}

.stat-icon {
    font-size: 35px;
    opacity: 0.15;
}

.stat-card-blue .stat-icon { color: var(--secondary-color); }
.stat-card-green .stat-icon { color: var(--success-color); }
.stat-card-red .stat-icon { color: var(--danger-color); }
.stat-card-purple .stat-icon { color: var(--purple-color); }

/* ========================================
   TABLES
   ======================================== */
.table-container {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    overflow: hidden;
    margin-bottom: 20px;
}

.table-header {
    padding: 18px 25px;
    border-bottom: 1px solid var(--border-color);
}

.table-header h2 {
    font-size: 16px;
    font-weight: 600;
}

.table-header-red h2 { color: var(--danger-color); }
.table-header-green h2 { color: var(--success-color); }
.table-header-yellow h2 { color: var(--warning-color); }
.table-header-blue h2 { color: var(--secondary-color); }

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

th {
    background: var(--primary-color);
    color: white;
    padding: 14px 16px;
    text-align: left;
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
    font-size: 14px;
}

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

tr:hover {
    background: #f8fafc;
}

tr.row-danger {
    background: #fef2f2;
}

tr.row-danger:hover {
    background: #fee2e2;
}

.center-text {
    text-align: center;
    padding: 30px !important;
    color: var(--muted-text);
}

.phone-link {
    color: var(--secondary-color);
    font-weight: 500;
}

.action-btns {
    display: flex;
    gap: 5px;
    flex-wrap: nowrap;
}

/* ========================================
   BADGES
   ======================================== */
.badge {
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    display: inline-block;
    white-space: nowrap;
}

.badge-success {
    background: #dcfce7;
    color: #166534;
}

.badge-danger {
    background: #fee2e2;
    color: #991b1b;
}

.badge-warning {
    background: #fef3c7;
    color: #92400e;
}

.badge-info {
    background: #e0f2fe;
    color: #075985;
}

/* ========================================
   BUTTONS
   ======================================== */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: var(--border-radius-sm);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    font-family: inherit;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    text-decoration: none;
    white-space: nowrap;
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    text-decoration: none;
}

.btn-primary { background: var(--secondary-color); color: white; }
.btn-success { background: var(--success-color); color: white; }
.btn-danger { background: var(--danger-color); color: white; }
.btn-warning { background: var(--warning-color); color: white; }
.btn-info { background: var(--info-color); color: white; }

.btn-sm {
    padding: 6px 10px;
    font-size: 12px;
}

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

/* ========================================
   SEARCH & FILTER BAR
   ======================================== */
.search-filter-bar {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
    flex-wrap: wrap;
    align-items: center;
}

.search-box {
    flex: 1;
    min-width: 250px;
    position: relative;
}

.search-box i {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--muted-text);
}

.search-box input {
    width: 100%;
    padding: 12px 12px 12px 40px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 14px;
    transition: all 0.3s;
    font-family: inherit;
}

.search-box input:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.search-filter-bar select {
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 14px;
    background: white;
    cursor: pointer;
    font-family: inherit;
    min-width: 160px;
}

.search-filter-bar select:focus {
    outline: none;
    border-color: var(--secondary-color);
}

/* Mini Stats */
.mini-stats {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.mini-stat {
    background: white;
    padding: 12px 20px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    display: flex;
    align-items: center;
    gap: 10px;
    border-left: 3px solid var(--secondary-color);
}

.mini-stat-green { border-left-color: var(--success-color); }
.mini-stat-yellow { border-left-color: var(--warning-color); }
.mini-stat-red { border-left-color: var(--danger-color); }

.mini-stat-label {
    font-size: 12px;
    color: var(--muted-text);
    font-weight: 500;
    text-transform: uppercase;
}

.mini-stat-value {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary-color);
}

/* ========================================
   FORMS
   ======================================== */
.form-container {
    background: white;
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    max-width: 850px;
    margin: 0 auto;
}

.form-section {
    margin: 25px 0 15px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--border-color);
}

.form-section h3 {
    color: var(--secondary-color);
    font-size: 16px;
    font-weight: 600;
}

.form-section h3 i {
    margin-right: 8px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 5px;
}

.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    color: var(--dark-text);
    font-weight: 500;
    font-size: 14px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 11px 14px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    font-size: 14px;
    transition: all 0.3s;
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* Remove spinner arrows from number inputs */
.form-group input[type="number"]::-webkit-outer-spin-button,
.form-group input[type="number"]::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.form-group input[type="number"] {
    -moz-appearance: textfield;
}

.form-group textarea {
    resize: vertical;
}

.readonly-field {
    background: #f8fafc !important;
    color: var(--muted-text);
    cursor: not-allowed;
}

.form-buttons {
    display: flex;
    gap: 12px;
    margin-top: 25px;
}

.form-buttons .btn {
    flex: 1;
    justify-content: center;
    padding: 14px;
    font-size: 16px;
}

/* Instalment Preview */
.instalment-preview {
    background: #f0f9ff;
    border: 2px solid #bae6fd;
    border-radius: var(--border-radius);
    padding: 20px;
    margin-top: 20px;
}

.instalment-preview h4 {
    color: var(--secondary-color);
    margin-bottom: 12px;
}

.preview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 12px;
}

.preview-grid div {
    background: white;
    padding: 10px 15px;
    border-radius: var(--border-radius-sm);
    font-size: 14px;
}

/* ========================================
   CLIENT DETAILS PAGE
   ======================================== */
.client-header-card {
    background: white;
    padding: 25px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    margin-bottom: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
}

.client-header-info {
    display: flex;
    align-items: center;
    gap: 20px;
}

.client-avatar {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 24px;
}

.client-header-info h2 {
    font-size: 22px;
    color: var(--primary-color);
    margin-bottom: 4px;
}

.client-header-info p {
    color: var(--muted-text);
    font-size: 14px;
    margin-bottom: 2px;
}

.detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

.detail-card {
    background: white;
    padding: 25px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.detail-card h3 {
    color: var(--secondary-color);
    font-size: 16px;
    margin-bottom: 18px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--border-color);
}

.detail-card h3 i {
    margin-right: 8px;
}

.info-row {
    display: flex;
    justify-content: space-between;
    padding: 10px 0;
    border-bottom: 1px solid #f1f5f9;
    font-size: 14px;
}

.info-row:last-child {
    border-bottom: none;
}

.info-row span {
    color: var(--muted-text);
}

.info-row strong {
    color: var(--dark-text);
}

/* Payment Summary Cards */
.payment-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 15px;
    margin-bottom: 20px;
}

.pay-card {
    background: white;
    padding: 18px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    text-align: center;
    border-top: 3px solid var(--border-color);
}

.pay-card h4 {
    font-size: 12px;
    color: var(--muted-text);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
}

.pay-amount {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary-color);
}

.pay-card-total { border-top-color: var(--secondary-color); }
.pay-card-advance { border-top-color: var(--info-color); }
.pay-card-paid { border-top-color: var(--success-color); }
.pay-card-remaining { border-top-color: var(--warning-color); }
.pay-card-monthly { border-top-color: var(--purple-color); }
.pay-card-progress { border-top-color: var(--secondary-color); }

/* Progress Bar */
.progress-bar-container {
    background: #e2e8f0;
    border-radius: 10px;
    overflow: hidden;
    height: 28px;
    margin-top: 5px;
}

.progress-bar {
    background: linear-gradient(90deg, var(--success-color), #34d399);
    height: 100%;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 13px;
    min-width: 35px;
    transition: width 0.5s ease;
}

/* Detail Actions */
.detail-actions {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

/* ========================================
   MODAL
   ======================================== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal-content {
    background: white;
    padding: 30px;
    border-radius: var(--border-radius);
    width: 100%;
    max-width: 450px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--border-color);
}

.modal-header h3 {
    color: var(--primary-color);
    font-size: 18px;
}

.modal-close {
    background: none;
    border: none;
    font-size: 28px;
    color: var(--muted-text);
    cursor: pointer;
    padding: 0 5px;
    line-height: 1;
}

.modal-close:hover {
    color: var(--danger-color);
}

/* ========================================
   NOTIFICATION POPUP
   ======================================== */
.notification-popup {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 9999;
    padding: 16px 24px;
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 14px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
    transform: translateX(120%);
    transition: transform 0.3s ease;
    max-width: 380px;
}

.notification-popup.show {
    transform: translateX(0);
}

.notification-success {
    background: #dcfce7;
    color: #166534;
    border-left: 4px solid var(--success-color);
}

.notification-danger {
    background: #fee2e2;
    color: #991b1b;
    border-left: 4px solid var(--danger-color);
}

/* ========================================
   ALERTS
   ======================================== */
.alert {
    padding: 14px 18px;
    border-radius: var(--border-radius-sm);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    font-weight: 500;
}

.alert-success {
    background: #dcfce7;
    color: #166534;
    border: 1px solid #bbf7d0;
}

.alert-danger {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

.alert-warning {
    background: #fef3c7;
    color: #92400e;
    border: 1px solid #fde68a;
}

/* ========================================
   LOADING SPINNER
   ======================================== */
.spinner-container {
    text-align: center;
    padding: 60px 20px;
}

.spinner-container p {
    margin-top: 15px;
    color: var(--muted-text);
    font-size: 14px;
}

.spinner {
    border: 4px solid #e2e8f0;
    border-top: 4px solid var(--secondary-color);
    border-radius: 50%;
    width: 45px;
    height: 45px;
    animation: spin 0.8s linear infinite;
    margin: 0 auto;
}

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

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.sidebar-open {
        transform: translateX(0);
        box-shadow: 5px 0 30px rgba(0,0,0,0.3);
    }
    
    .main-content {
        margin-left: 0;
        padding: 15px;
    }
    
    .mobile-toggle {
        display: inline-block;
    }
    
    .header {
        padding: 14px 18px;
    }
    
    .header h1 {
        font-size: 18px;
    }
    
    .stats-container {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }
    
    .stat-card {
        padding: 15px;
    }
    
    .stat-info .number {
        font-size: 20px;
    }

    .stat-icon {
        font-size: 25px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
        gap: 0;
    }
    
    .search-filter-bar {
        flex-direction: column;
    }

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

    .search-filter-bar select {
        width: 100%;
    }
    
    .detail-grid {
        grid-template-columns: 1fr;
    }
    
    .payment-summary {
        grid-template-columns: repeat(2, 1fr);
    }

    .mini-stats {
        flex-direction: column;
    }
    
    .client-header-card {
        flex-direction: column;
        text-align: center;
    }
    
    .client-header-info {
        flex-direction: column;
    }
    
    .detail-actions {
        flex-direction: column;
    }
    
    .detail-actions .btn {
        justify-content: center;
    }

    table {
        font-size: 13px;
    }

    th, td {
        padding: 10px 8px;
    }

    .form-buttons {
        flex-direction: column;
    }

    .user-info span {
        display: none;
    }
}

@media (max-width: 480px) {
    .stats-container {
        grid-template-columns: 1fr;
    }
    
    .payment-summary {
        grid-template-columns: 1fr;
    }

    .login-box {
        padding: 25px;
    }
}