/* BPP Customer Portal - Styles
   Brand: Dark Charcoal (#3D3D3D) + White
   Font: DM Sans (Google Fonts)
*/

/* ========================================
   CSS VARIABLES
======================================== */
:root {
    --color-primary: #3D3D3D;
    --color-primary-dark: #2a2a2a;
    --color-primary-light: #555555;
    --color-white: #ffffff;
    --color-off-white: #f8f9fa;
    --color-border: #e5e5e5;
    --color-border-dark: #d0d0d0;
    --color-text: #333333;
    --color-text-muted: #6c757d;
    --color-success: #28a745;
    --color-error: #dc3545;
    --color-warning: #ffc107;
    
    --font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-full: 9999px;
    
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
    
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
}

/* ========================================
   RESET & BASE
======================================== */
*, *::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-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-off-white);
    min-height: 100vh;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-primary-dark);
}

img {
    max-width: 100%;
    height: auto;
}

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

.sidebar {
    width: 260px;
    background: var(--color-primary);
    color: var(--color-white);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    z-index: 100;
}

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

.sidebar-logo {
    height: 40px;
    width: auto;
}

.sidebar-nav {
    flex: 1;
    padding: var(--spacing-lg) 0;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-xl);
    color: rgba(255, 255, 255, 0.7);
    font-weight: 500;
    transition: all var(--transition-fast);
    border-left: 3px solid transparent;
}

.nav-item:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--color-white);
}

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

.nav-item svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.sidebar-footer {
    padding: var(--spacing-lg) var(--spacing-xl);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.user-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: var(--font-size-sm);
}

.user-details {
    flex: 1;
    min-width: 0;
}

.user-name {
    font-weight: 600;
    font-size: var(--font-size-sm);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-company {
    font-size: var(--font-size-xs);
    color: rgba(255, 255, 255, 0.6);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.main-content {
    flex: 1;
    margin-left: 260px;
    padding: var(--spacing-xl);
    min-height: 100vh;
}

/* ========================================
   LOGIN PAGE
======================================== */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    padding: var(--spacing-lg);
}

.login-container {
    background: var(--color-white);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 420px;
}

.login-logo {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.login-logo img {
    height: 60px;
    width: auto;
}

.login-title {
    text-align: center;
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    color: var(--color-primary);
}

.login-subtitle {
    text-align: center;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-xl);
    font-size: var(--font-size-sm);
}

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

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

.form-label .required {
    color: var(--color-error);
}

.form-label .optional {
    color: var(--color-text-muted);
    font-weight: 400;
}

.form-control {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-family: inherit;
    transition: all var(--transition-fast);
    background: var(--color-white);
}

.form-control:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(61, 61, 61, 0.1);
}

.form-control::placeholder {
    color: var(--color-text-muted);
}

.form-control:disabled {
    background: var(--color-off-white);
    cursor: not-allowed;
}

textarea.form-control {
    min-height: 100px;
    resize: vertical;
}

select.form-control {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236c757d' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

/* ========================================
   BUTTONS
======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-base);
    font-weight: 600;
    font-family: inherit;
    border-radius: var(--radius-md);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    white-space: nowrap;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
    background: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
}

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

.btn-secondary:hover:not(:disabled) {
    background: var(--color-off-white);
    border-color: var(--color-primary);
}

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

.btn-outline:hover:not(:disabled) {
    background: var(--color-primary);
    color: var(--color-white);
}

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

.btn-danger:hover:not(:disabled) {
    background: #c82333;
    border-color: #c82333;
}

.btn-sm {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
}

.btn-lg {
    padding: var(--spacing-lg) var(--spacing-2xl);
    font-size: var(--font-size-lg);
}

.btn-block {
    width: 100%;
}

/* ========================================
   CARDS
======================================== */
.card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
}

.card-header {
    padding: var(--spacing-lg) var(--spacing-xl);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
}

.card-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin: 0;
}

.card-body {
    padding: var(--spacing-xl);
}

.card-footer {
    padding: var(--spacing-lg) var(--spacing-xl);
    border-top: 1px solid var(--color-border);
    background: var(--color-off-white);
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

/* ========================================
   PAGE HEADER
======================================== */
.page-header {
    margin-bottom: var(--spacing-xl);
}

.page-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.page-subtitle {
    color: var(--color-text-muted);
    font-size: var(--font-size-base);
}

/* ========================================
   ALERTS
======================================== */
.alert {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
}

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

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

.alert-warning {
    background: #fff3cd;
    color: #856404;
    border: 1px solid #ffeeba;
}

.alert-info {
    background: #e7f3ff;
    color: #004085;
    border: 1px solid #b8daff;
}

/* ========================================
   TABLES
======================================== */
.table-container {
    overflow-x: auto;
}

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

.table th,
.table td {
    padding: var(--spacing-md) var(--spacing-lg);
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

.table th {
    font-weight: 600;
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    background: var(--color-off-white);
}

.table tbody tr:hover {
    background: var(--color-off-white);
}

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

/* ========================================
   BADGES
======================================== */
.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-size-xs);
    font-weight: 600;
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-success {
    background: #d4edda;
    color: #155724;
}

.badge-warning {
    background: #fff3cd;
    color: #856404;
}

.badge-error {
    background: #f8d7da;
    color: #721c24;
}

.badge-info {
    background: #e7f3ff;
    color: #004085;
}

.badge-default {
    background: var(--color-off-white);
    color: var(--color-text-muted);
}

/* ========================================
   ORDER ITEM CARD
======================================== */
.order-item {
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    background: var(--color-off-white);
    position: relative;
}

.order-item:hover {
    border-color: var(--color-border-dark);
}

.order-item-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-md);
}

.order-item-number {
    font-weight: 700;
    font-size: var(--font-size-lg);
    color: var(--color-primary);
}

.order-item-remove {
    background: none;
    border: none;
    color: var(--color-text-muted);
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.order-item-remove:hover {
    background: var(--color-error);
    color: var(--color-white);
}

.product-info-display {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.product-info-display dt {
    font-weight: 600;
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.product-info-display dd {
    margin: 0 0 var(--spacing-sm) 0;
    font-size: var(--font-size-sm);
}

/* ========================================
   QUANTITY SELECTOR
======================================== */
.quantity-options {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.quantity-option {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-md);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-white);
    cursor: pointer;
    transition: all var(--transition-fast);
    min-width: 100px;
}

.quantity-option:hover {
    border-color: var(--color-primary-light);
}

.quantity-option.selected {
    border-color: var(--color-primary);
    background: rgba(61, 61, 61, 0.05);
}

.quantity-option input[type="radio"] {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.quantity-value {
    font-weight: 700;
    font-size: var(--font-size-lg);
    color: var(--color-primary);
}

.quantity-price {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-top: var(--spacing-xs);
}

/* ========================================
   ORDER SUMMARY
======================================== */
.order-summary {
    background: var(--color-off-white);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
}

.summary-line {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--color-border);
}

.summary-line:last-child {
    border-bottom: none;
}

.summary-total {
    font-size: var(--font-size-xl);
    font-weight: 700;
    padding-top: var(--spacing-md);
    margin-top: var(--spacing-sm);
    border-top: 2px solid var(--color-primary);
}

/* ========================================
   EMPTY STATE
======================================== */
.empty-state {
    text-align: center;
    padding: var(--spacing-2xl);
    color: var(--color-text-muted);
}

.empty-state svg {
    width: 64px;
    height: 64px;
    margin-bottom: var(--spacing-lg);
    opacity: 0.5;
}

.empty-state-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

/* ========================================
   LOADING STATES
======================================== */
.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-2xl);
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.btn .spinner {
    width: 16px;
    height: 16px;
    border-width: 2px;
}

/* ========================================
   RESPONSIVE
======================================== */
@media (max-width: 1024px) {
    .sidebar {
        width: 80px;
    }
    
    .sidebar-header {
        padding: var(--spacing-lg);
        text-align: center;
    }
    
    .sidebar-logo {
        height: 30px;
    }
    
    .nav-item {
        justify-content: center;
        padding: var(--spacing-md);
    }
    
    .nav-item span {
        display: none;
    }
    
    .sidebar-footer {
        padding: var(--spacing-md);
    }
    
    .user-details {
        display: none;
    }
    
    .main-content {
        margin-left: 80px;
    }
}

@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        left: -260px;
        width: 260px;
        transition: left var(--transition-base);
    }
    
    .sidebar.open {
        left: 0;
    }
    
    .sidebar .nav-item span,
    .sidebar .user-details {
        display: block;
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .mobile-header {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: var(--spacing-md) var(--spacing-lg);
        background: var(--color-white);
        border-bottom: 1px solid var(--color-border);
        position: sticky;
        top: 0;
        z-index: 50;
    }
    
    .mobile-menu-btn {
        background: none;
        border: none;
        padding: var(--spacing-sm);
        cursor: pointer;
        color: var(--color-primary);
    }
    
    .mobile-logo {
        height: 32px;
    }
    
    .sidebar-overlay {
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: 99;
        display: none;
    }
    
    .sidebar-overlay.active {
        display: block;
    }
}

/* ========================================
   UTILITIES
======================================== */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--color-text-muted); }
.text-success { color: var(--color-success); }
.text-error { color: var(--color-error); }
.text-sm { font-size: var(--font-size-sm); }
.text-lg { font-size: var(--font-size-lg); }
.font-bold { font-weight: 700; }
.font-medium { font-weight: 500; }

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.d-flex { display: flex; }
.align-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }

.hidden { display: none !important; }