/**
 * Invoice SaaS — Modern, Compact SaaS Design System
 * Branch: saasbased (Phase 4 UI/UX Redesign)
 */

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

:root {
    /* Brand & Accent Palette */
    --saas-primary: #4F46E5;
    --saas-primary-hover: #4338CA;
    --saas-primary-light: #EEF2FF;
    --saas-primary-ring: rgba(79, 70, 229, 0.16);

    --saas-success: #16A34A;
    --saas-success-light: #F0FDF4;
    --saas-warning: #D97706;
    --saas-warning-light: #FFFBEB;
    --saas-danger: #DC2626;
    --saas-danger-light: #FEF2F2;
    --saas-info: #0284C7;
    --saas-info-light: #F0F9FF;

    /* Neutrals & Surfaces */
    --saas-text-main: #0F172A;
    --saas-text-muted: #64748B;
    --saas-text-subtle: #94A3B8;

    --saas-border: #E2E8F0;
    --saas-border-subtle: #F1F5F9;
    --saas-bg: #F8FAFC;
    --saas-surface: #FFFFFF;
    --saas-surface-hover: #F8FAFC;

    /* Navbar / Header */
    --saas-nav-bg: #0F172A;
    --saas-nav-border: #1E293B;
    --saas-nav-text: #E2E8F0;
    --saas-nav-muted: #94A3B8;

    /* Sizing & Geometry */
    --saas-radius: 8px;
    --saas-radius-sm: 6px;
    --saas-radius-lg: 10px;

    /* Spacing Scale: 4px, 8px, 12px, 16px, 20px */
    --saas-space-1: 0.25rem;  /* 4px */
    --saas-space-2: 0.5rem;   /* 8px */
    --saas-space-3: 0.75rem;  /* 12px */
    --saas-space-4: 1rem;     /* 16px */
    --saas-space-5: 1.25rem;  /* 20px */

    /* Typography */
    --saas-font: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

/* Global Reset & Base Typography */
body {
    font-family: var(--saas-font);
    background-color: var(--saas-bg);
    color: var(--saas-text-main);
    font-size: 0.9375rem; /* 15px */
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    padding-top: 58px !important;
}

h1, h2, h3, h4, h5, h6,
.h1, .h2, .h3, .h4, .h5, .h6 {
    font-family: var(--saas-font);
    font-weight: 600;
    color: var(--saas-text-main);
    letter-spacing: -0.015em;
}

h1, .h1 { font-size: 1.5rem !important; }   /* 24px */
h2, .h2 { font-size: 1.35rem !important; }  /* 21.6px */
h3, .h3 { font-size: 1.2rem !important; }   /* 19.2px */
h4, .h4 { font-size: 1.05rem !important; }  /* 16.8px */
h5, .h5 { font-size: 0.95rem !important; }  /* 15.2px */
h6, .h6 { font-size: 0.875rem !important; } /* 14px */

.text-muted {
    color: var(--saas-text-muted) !important;
}

/* Compact Container */
.container, .container-fluid {
    max-width: 1440px;
    padding-left: 1rem;
    padding-right: 1rem;
}

/* Navbar — Sleek Modern SaaS Bar */
.navbar {
    height: 58px;
    background-color: var(--saas-nav-bg) !important;
    border-bottom: 1px solid var(--saas-nav-border);
    padding: 0 1rem;
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.05rem;
    color: #FFFFFF !important;
    letter-spacing: -0.01em;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0;
}

.navbar-nav .nav-link {
    font-size: 0.9rem; /* 14.4px */
    font-weight: 500;
    color: var(--saas-nav-muted) !important;
    padding: 0.4rem 0.75rem !important;
    border-radius: var(--saas-radius-sm);
    transition: all 0.15s ease;
}

.navbar-nav .nav-link:hover {
    color: #FFFFFF !important;
    background-color: rgba(255, 255, 255, 0.08);
}

.navbar-nav .nav-link.active {
    color: #FFFFFF !important;
    background-color: var(--saas-primary) !important;
}

/* Cards & Surfaces */
.card {
    background-color: var(--saas-surface);
    border: 1px solid var(--saas-border);
    border-radius: var(--saas-radius);
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.04);
    margin-bottom: 0.85rem;
}

.card-header {
    background-color: var(--saas-surface);
    border-bottom: 1px solid var(--saas-border);
    padding: 0.75rem 1rem;
    font-weight: 600;
    font-size: 0.95rem;
}

.card-body {
    padding: 1rem;
}

.card-footer {
    background-color: #F8FAFC;
    border-top: 1px solid var(--saas-border);
    padding: 0.75rem 1rem;
}

/* Forms & Inputs */
.form-label {
    font-size: 0.875rem; /* 14px */
    font-weight: 600;
    color: #334155;
    margin-bottom: 0.35rem;
    letter-spacing: -0.01em;
}

.form-control,
.form-select {
    font-size: 0.9375rem; /* 15px */
    height: 40px;
    min-height: 40px;
    padding: 0.45rem 0.75rem;
    border-color: var(--saas-border);
    border-radius: var(--saas-radius-sm);
    color: var(--saas-text-main);
    background-color: #FFFFFF;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-control:focus,
.form-select:focus {
    border-color: var(--saas-primary);
    box-shadow: 0 0 0 3px var(--saas-primary-ring);
    outline: none;
}

textarea.form-control {
    height: auto;
    min-height: 68px;
}

/* Buttons */
.btn {
    font-size: 0.9rem; /* 14.4px */
    font-weight: 600;
    padding: 0.45rem 0.95rem;
    border-radius: var(--saas-radius-sm);
    height: 38px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
    transition: all 0.15s ease;
    border: 1px solid transparent;
}

.btn-sm {
    font-size: 0.875rem; /* 14px */
    height: 34px;
    padding: 0.3rem 0.75rem;
}

.btn-lg {
    font-size: 1rem; /* 16px */
    height: 44px;
    padding: 0.55rem 1.25rem;
}

.btn-primary {
    background-color: var(--saas-primary);
    border-color: var(--saas-primary);
    color: #FFFFFF;
}

.btn-primary:hover, .btn-primary:focus, .btn-primary:active {
    background-color: var(--saas-primary-hover) !important;
    border-color: var(--saas-primary-hover) !important;
    color: #FFFFFF !important;
}

.btn-outline-primary {
    color: var(--saas-primary);
    border-color: var(--saas-border);
    background-color: #FFFFFF;
}

.btn-outline-primary:hover {
    background-color: var(--saas-primary-light);
    border-color: var(--saas-primary);
    color: var(--saas-primary);
}

.btn-outline-secondary {
    color: #475569;
    border-color: var(--saas-border);
    background-color: #FFFFFF;
}

.btn-outline-secondary:hover {
    background-color: #F1F5F9;
    border-color: #CBD5E1;
    color: #1E293B;
}

.btn-success {
    background-color: var(--saas-success);
    border-color: var(--saas-success);
    color: #FFFFFF;
}

.btn-danger {
    background-color: var(--saas-danger);
    border-color: var(--saas-danger);
    color: #FFFFFF;
}

/* Modern SaaS Tables */
.table {
    font-size: 0.875rem; /* 14px */
    color: var(--saas-text-main);
    margin-bottom: 0;
    border-color: var(--saas-border);
}

.table th {
    font-size: 0.8125rem; /* 13px */
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    color: #475569;
    background-color: #F8FAFC;
    border-bottom: 1px solid var(--saas-border);
    padding: 0.65rem 0.85rem;
    vertical-align: middle;
}

.table td {
    padding: 0.65rem 0.85rem;
    vertical-align: middle;
    border-bottom: 1px solid var(--saas-border);
    font-size: 0.875rem; /* 14px */
}

.table-hover tbody tr:hover {
    background-color: #F8FAFC;
}

/* Badges */
.badge {
    font-weight: 600;
    font-size: 0.8125rem; /* 13px */
    padding: 0.28rem 0.6rem;
    border-radius: 5px;
    letter-spacing: 0.01em;
}

.badge.bg-success-subtle, .badge.text-success {
    background-color: var(--saas-success-light) !important;
    color: var(--saas-success) !important;
    border: 1px solid rgba(22, 163, 74, 0.2);
}

.badge.bg-danger-subtle, .badge.text-danger {
    background-color: var(--saas-danger-light) !important;
    color: var(--saas-danger) !important;
    border: 1px solid rgba(220, 38, 38, 0.2);
}

.badge.bg-warning-subtle, .badge.text-warning-emphasis {
    background-color: var(--saas-warning-light) !important;
    color: var(--saas-warning) !important;
    border: 1px solid rgba(217, 119, 6, 0.2);
}

.badge.bg-primary-subtle, .badge.text-primary {
    background-color: var(--saas-primary-light) !important;
    color: var(--saas-primary) !important;
    border: 1px solid rgba(79, 70, 229, 0.2);
}

/* Dropdown Menus */
.dropdown-menu {
    border-color: var(--saas-border);
    border-radius: var(--saas-radius);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    font-size: 0.8125rem;
    padding: 0.25rem;
}

.dropdown-item {
    border-radius: var(--saas-radius-sm);
    padding: 0.35rem 0.65rem;
    font-weight: 500;
    color: #334155;
}

.dropdown-item:hover, .dropdown-item:focus {
    background-color: #F1F5F9;
    color: var(--saas-primary);
}

.dropdown-item.active {
    background-color: var(--saas-primary);
    color: #FFFFFF;
}

/* Compact Alerts */
.alert {
    padding: 0.5rem 0.875rem;
    font-size: 0.8125rem;
    border-radius: var(--saas-radius-sm);
    margin-bottom: 0.75rem;
    border: 1px solid transparent;
}

.alert-success {
    background-color: var(--saas-success-light);
    border-color: #BBF7D0;
    color: #14532D;
}

.alert-danger {
    background-color: var(--saas-danger-light);
    border-color: #FECACA;
    color: #7F1D1D;
}

.alert-info {
    background-color: var(--saas-info-light);
    border-color: #BAE6FD;
    color: #0C4A6E;
}

/* Modals */
.modal-content {
    border: 1px solid var(--saas-border);
    border-radius: var(--saas-radius-lg);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
}

.modal-header {
    border-bottom: 1px solid var(--saas-border);
    padding: 0.75rem 1rem;
}

.modal-body {
    padding: 1rem;
}

.modal-footer {
    border-top: 1px solid var(--saas-border);
    padding: 0.625rem 1rem;
}

/* KPI Widget Styles */
.kpi-compact-card {
    background: #FFFFFF;
    border: 1px solid var(--saas-border);
    border-radius: var(--saas-radius);
    padding: 0.75rem 1rem;
    box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: all 0.15s ease;
    height: 100%;
}

.kpi-compact-card:hover {
    border-color: #CBD5E1;
    box-shadow: 0 3px 6px -1px rgba(15, 23, 42, 0.06);
}

.kpi-compact-card.border-accent-primary { border-left: 3px solid var(--saas-primary) !important; }
.kpi-compact-card.border-accent-success { border-left: 3px solid var(--saas-success) !important; }
.kpi-compact-card.border-accent-info    { border-left: 3px solid var(--saas-info) !important; }
.kpi-compact-card.border-accent-warning { border-left: 3px solid var(--saas-warning) !important; }
.kpi-compact-card.border-accent-danger  { border-left: 3px solid var(--saas-danger) !important; }

.kpi-compact-label {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--saas-text-muted);
    margin-bottom: 2px;
}

.kpi-compact-value {
    font-size: 1.25rem;
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.015em;
    color: var(--saas-text-main);
}

.kpi-compact-icon {
    width: 38px;
    height: 38px;
    border-radius: var(--saas-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.15rem;
    flex-shrink: 0;
}

.kpi-stat-card {
    background: #FFFFFF;
    border: 1px solid var(--saas-border);
    border-radius: var(--saas-radius);
    padding: 1rem 1.15rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
    overflow: hidden;
}

.kpi-stat-card:hover {
    border-color: #CBD5E1;
    box-shadow: 0 4px 12px -2px rgba(15, 23, 42, 0.08);
    transform: translateY(-2px);
}

.kpi-stat-label {
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--saas-text-muted);
    margin-bottom: 0.25rem;
}

.kpi-stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--saas-text-main);
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.kpi-stat-icon {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.kpi-badge-trend {
    font-size: 0.72rem;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    margin-top: 0.35rem;
}

/* Quick Action Tiles */
.quick-action-tile {
    background: #FFFFFF;
    border: 1px solid var(--saas-border);
    border-radius: var(--saas-radius);
    padding: 0.85rem 0.75rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    text-decoration: none;
    color: var(--saas-text-main);
    transition: all 0.2s ease;
    gap: 0.4rem;
}

.quick-action-tile:hover {
    border-color: var(--saas-primary);
    background-color: var(--saas-primary-light);
    color: var(--saas-primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 6px -1px rgba(79, 70, 229, 0.1);
}

.quick-action-tile .icon-wrap {
    width: 38px;
    height: 38px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.15rem;
}

/* Secondary KPI Strip */
.kpi-strip {
    background: #FFFFFF;
    border: 1px solid var(--saas-border);
    border-radius: var(--saas-radius);
    padding: 0.5rem 1rem;
    display: flex;
    align-items: center;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: 1rem;
}

.kpi-strip-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8125rem;
}

.kpi-strip-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

/* Empty State Widget */
.empty-state-box {
    padding: 2.5rem 1.5rem;
    text-align: center;
}

.empty-state-icon {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background-color: #F1F5F9;
    color: #64748B;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
}

/* Navbar Polish */
.company-switch-btn {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: #F1F5F9 !important;
    border-radius: 20px;
    padding: 0.3rem 0.85rem !important;
    font-size: 0.8rem;
    font-weight: 500;
    transition: all 0.15s ease;
}

.company-switch-btn:hover {
    background: rgba(255, 255, 255, 0.16);
    border-color: rgba(255, 255, 255, 0.25);
    color: #FFFFFF !important;
}

.user-avatar-badge {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: linear-gradient(135deg, #4F46E5, #06B6D4);
    color: #FFFFFF;
    font-size: 0.75rem;
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-transform: uppercase;
}