/* ==========================================================================
   AVOSIST CRM - Premium Design System
   ========================================================================== */

/* CSS Variables - Dark Theme */
:root {
    /* Colors */
    --color-bg-primary: #0a0a0f;
    --color-bg-secondary: #12121a;
    --color-bg-tertiary: #1a1a24;
    --color-bg-card: #16161f;
    --color-bg-hover: #1f1f2a;
    
    --color-border: rgba(255, 255, 255, 0.08);
    --color-border-light: rgba(255, 255, 255, 0.04);
    
    --color-text-primary: #ffffff;
    --color-text-secondary: #a0a0b0;
    --color-text-muted: #6b6b7a;
    
    --color-accent: #6366f1;
    --color-accent-light: #818cf8;
    --color-accent-dark: #4f46e5;
    
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    --color-info: #3b82f6;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    --gradient-success: linear-gradient(135deg, #10b981 0%, #059669 100%);
    --gradient-card: linear-gradient(145deg, rgba(22, 22, 31, 0.8) 0%, rgba(10, 10, 15, 0.9) 100%);
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.15);
    
    /* Sizes */
    --sidebar-width: 260px;
    --header-height: 64px;
    --border-radius: 12px;
    --border-radius-lg: 16px;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
    --transition-slow: 0.4s ease;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--color-bg-primary);
    color: var(--color-text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ==========================================================================
   APP LAYOUT
   ========================================================================== */

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

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    height: 100vh;
    position: fixed;
    left: 0;
    top: 0;
    background: var(--color-bg-secondary);
    border-right: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    z-index: 100;
    transition: transform var(--transition-normal);
}

.sidebar-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--color-border);
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--color-text-primary);
    font-weight: 600;
    font-size: 1.1rem;
}

.logo svg {
    color: var(--color-accent);
}

.sidebar-nav {
    flex: 1;
    padding: 1rem 0.75rem;
    overflow-y: auto;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    border-radius: var(--border-radius);
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition-fast);
    margin-bottom: 0.25rem;
}

.nav-item:hover {
    background: var(--color-bg-hover);
    color: var(--color-text-primary);
}

.nav-item.active {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-glow);
}

.nav-divider {
    height: 1px;
    background: var(--color-border);
    margin: 1rem 0;
}

.sidebar-footer {
    padding: 1rem;
    border-top: 1px solid var(--color-border);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 1rem;
}

.user-details {
    display: flex;
    flex-direction: column;
}

.user-name {
    font-weight: 500;
    font-size: 0.9rem;
}

.user-role {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.logout-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    width: 100%;
    padding: 0.625rem 1rem;
    border: none;
    border-radius: var(--border-radius);
    background: transparent;
    color: var(--color-text-secondary);
    font-size: 0.85rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.logout-btn:hover {
    background: rgba(239, 68, 68, 0.1);
    color: var(--color-error);
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 2rem;
    min-height: 100vh;
}

.mobile-header {
    display: none;
    align-items: center;
    gap: 1rem;
    padding: 1rem 0;
    margin-bottom: 1rem;
}

.menu-toggle {
    background: none;
    border: none;
    color: var(--color-text-primary);
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-title {
    font-weight: 600;
    font-size: 1.1rem;
}

/* ==========================================================================
   GUEST LAYOUT (Login)
   ========================================================================== */

.guest-body {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-primary);
    background-image: 
        radial-gradient(ellipse at 20% 50%, rgba(99, 102, 241, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(139, 92, 246, 0.08) 0%, transparent 50%);
}

.guest-container {
    width: 100%;
    max-width: 420px;
    padding: 1.5rem;
}

.login-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: 2.5rem;
    box-shadow: var(--shadow-lg);
}

.login-header {
    text-align: center;
    margin-bottom: 2rem;
}

.login-logo {
    width: 56px;
    height: 56px;
    background: var(--gradient-primary);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
}

.login-logo svg {
    color: white;
}

.login-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.login-subtitle {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

/* ==========================================================================
   PUBLIC LAYOUT (Proposal View)
   ========================================================================== */

.public-body {
    min-height: 100vh;
    background: var(--color-bg-primary);
    padding: 2rem;
}

.public-container {
    max-width: 900px;
    margin: 0 auto;
}

/* ==========================================================================
   COMPONENTS
   ========================================================================== */

/* Page Header */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.page-title {
    font-size: 1.75rem;
    font-weight: 600;
}

.page-actions {
    display: flex;
    gap: 0.75rem;
}

/* Cards */
.card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: 1.5rem;
    transition: all var(--transition-normal);
}

.card:hover {
    border-color: rgba(255, 255, 255, 0.12);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.25rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--color-border);
}

.card-title {
    font-size: 1.1rem;
    font-weight: 600;
}

/* Stats Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.25rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: 1.5rem;
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

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

.stat-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.stat-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(99, 102, 241, 0.1);
    color: var(--color-accent);
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
    text-decoration: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.25);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(99, 102, 241, 0.35);
}

.btn-secondary {
    background: var(--color-bg-tertiary);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background: var(--color-bg-hover);
    border-color: rgba(255, 255, 255, 0.15);
}

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

.btn-success:hover {
    transform: translateY(-1px);
}

.btn-danger {
    background: rgba(239, 68, 68, 0.1);
    color: var(--color-error);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.btn-danger:hover {
    background: rgba(239, 68, 68, 0.2);
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.8rem;
}

.btn-icon {
    padding: 0.625rem;
}

/* Forms */
.form-group {
    margin-bottom: 1.25rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text-secondary);
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--color-bg-primary);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    color: var(--color-text-primary);
    font-size: 0.9rem;
    transition: all var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

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

.form-control.error {
    border-color: var(--color-error);
}

.form-error {
    margin-top: 0.375rem;
    font-size: 0.8rem;
    color: var(--color-error);
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23a0a0b0' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    padding-right: 2.5rem;
}

textarea.form-control {
    min-height: 120px;
    resize: vertical;
}

.checkbox-label {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-size: 0.9rem;
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--color-accent);
}

/* Tables */
.table-container {
    overflow-x: auto;
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--color-border);
    background: var(--color-bg-card);
}

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

.table th,
.table td {
    padding: 1rem 1.25rem;
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

.table th {
    background: var(--color-bg-tertiary);
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-secondary);
}

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

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

.table-actions {
    display: flex;
    gap: 0.5rem;
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 500;
}

.badge-gray {
    background: rgba(107, 114, 128, 0.15);
    color: #9ca3af;
}

.badge-blue {
    background: rgba(59, 130, 246, 0.15);
    color: #60a5fa;
}

.badge-green {
    background: rgba(16, 185, 129, 0.15);
    color: #34d399;
}

.badge-yellow {
    background: rgba(245, 158, 11, 0.15);
    color: #fbbf24;
}

.badge-red {
    background: rgba(239, 68, 68, 0.15);
    color: #f87171;
}

.badge-orange {
    background: rgba(249, 115, 22, 0.15);
    color: #fb923c;
}

/* Alerts */
.alert {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.25rem;
    border-radius: var(--border-radius);
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
}

.alert-success {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.2);
    color: var(--color-success);
}

.alert-error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.2);
    color: var(--color-error);
}

.alert-info {
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.2);
    color: var(--color-info);
}

/* Modal */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 1rem;
}

.modal {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    animation: modalIn 0.2s ease-out;
}

@keyframes modalIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--color-border);
}

.modal-title {
    font-size: 1.1rem;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    color: var(--color-text-muted);
    cursor: pointer;
    padding: 0.25rem;
    transition: color var(--transition-fast);
}

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

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
    padding: 1.25rem 1.5rem;
    border-top: 1px solid var(--color-border);
}

/* Pagination */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 1.5rem;
}

.pagination a,
.pagination span {
    padding: 0.5rem 0.875rem;
    border-radius: var(--border-radius);
    font-size: 0.85rem;
    transition: all var(--transition-fast);
}

.pagination a {
    background: var(--color-bg-tertiary);
    color: var(--color-text-secondary);
    text-decoration: none;
}

.pagination a:hover {
    background: var(--color-bg-hover);
    color: var(--color-text-primary);
}

.pagination .active span {
    background: var(--gradient-primary);
    color: white;
}

/* Period Selector */
.period-selector {
    display: flex;
    gap: 0.5rem;
    background: var(--color-bg-tertiary);
    padding: 0.25rem;
    border-radius: var(--border-radius);
}

.period-btn {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: calc(var(--border-radius) - 2px);
    background: transparent;
    color: var(--color-text-secondary);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.period-btn:hover {
    color: var(--color-text-primary);
}

.period-btn.active {
    background: var(--color-accent);
    color: white;
}

/* Tabs */
.tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 0.5rem;
}

.tab-btn {
    padding: 0.75rem 1.25rem;
    background: none;
    border: none;
    border-radius: var(--border-radius);
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.tab-btn:hover {
    background: var(--color-bg-hover);
    color: var(--color-text-primary);
}

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

/* Empty State */
.empty-state {
    text-align: center;
    padding: 3rem 2rem;
    color: var(--color-text-secondary);
}

.empty-state svg {
    width: 64px;
    height: 64px;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.empty-state h3 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: var(--color-text-primary);
}

/* Search Box */
.search-box {
    position: relative;
    max-width: 300px;
}

.search-box input {
    padding-left: 2.75rem;
}

.search-box svg {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-muted);
}

/* Filters */
.filters {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

/* Dropdown */
.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    margin-top: 0.25rem;
    box-shadow: var(--shadow-lg);
    z-index: 50;
    max-height: 250px;
    overflow-y: auto;
}

.dropdown-item {
    padding: 0.75rem 1rem;
    cursor: pointer;
    transition: background var(--transition-fast);
}

.dropdown-item:hover {
    background: var(--color-bg-hover);
}

/* Grid Layouts */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

/* List */
.list {
    display: flex;
    flex-direction: column;
}

.list-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 0;
    border-bottom: 1px solid var(--color-border);
}

.list-item:last-child {
    border-bottom: none;
}

/* Invoice/Proposal Items */
.items-table {
    margin: 1.5rem 0;
}

.item-row {
    display: grid;
    grid-template-columns: 1fr 100px 120px 80px 100px 120px 40px;
    gap: 0.75rem;
    align-items: center;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--color-border-light);
}

.item-row input,
.item-row select {
    padding: 0.5rem 0.75rem;
    font-size: 0.85rem;
}

.add-item-btn {
    margin-top: 1rem;
}

/* Totals */
.totals-section {
    display: flex;
    justify-content: flex-end;
    margin-top: 1.5rem;
}

.totals-table {
    width: 300px;
}

.totals-row {
    display: flex;
    justify-content: space-between;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--color-border-light);
}

.totals-row.total {
    font-weight: 600;
    font-size: 1.1rem;
    border-bottom: none;
    padding-top: 1rem;
}

/* Public Proposal */
.proposal-public {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
}

.proposal-public-header {
    background: var(--gradient-primary);
    padding: 2rem;
    text-align: center;
}

.proposal-public-content {
    padding: 2rem;
}

.proposal-actions-public {
    display: flex;
    gap: 1rem;
    justify-content: center;
    padding: 1.5rem;
    border-top: 1px solid var(--color-border);
}

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

@media (max-width: 1024px) {
    .grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0;
        padding: 1rem;
    }

    .mobile-header {
        display: flex;
    }

    .page-header {
        flex-direction: column;
        align-items: flex-start;
    }

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

    .grid-2,
    .grid-3 {
        grid-template-columns: 1fr;
    }

    .item-row {
        grid-template-columns: 1fr;
        gap: 0.5rem;
        padding: 1rem;
        background: var(--color-bg-tertiary);
        border-radius: var(--border-radius);
        margin-bottom: 0.5rem;
    }

    .tabs {
        flex-wrap: wrap;
    }

    .filters {
        flex-direction: column;
    }

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

@media (max-width: 480px) {
    .login-card {
        padding: 1.5rem;
    }

    .stat-value {
        font-size: 1.5rem;
    }

    .modal {
        margin: 0.5rem;
    }
}

/* ==========================================================================
   UTILITIES
   ========================================================================== */

.text-success { color: var(--color-success); }
.text-warning { color: var(--color-warning); }
.text-error { color: var(--color-error); }
.text-muted { color: var(--color-text-muted); }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.gap-3 { gap: 1.5rem; }

.w-full { width: 100%; }
.hidden { display: none; }