/* LocumTrack v3 — Institutional Medical SaaS Design System */
:root {
  /* ─── Institutional Palette ─── */
  --color-primary:          #0F6CBD;   /* Medical Blue */
  --color-primary-hover:    #0B5AA2;
  --color-primary-contrast: #FFFFFF;
  --color-primary-soft:     #F0F7FF;   /* Soft highlight */

  --color-secondary:        #14B8A6;   /* Teal / Success */
  --color-secondary-hover:  #0D9488;

  --color-surface:          #FFFFFF;   /* Main background */
  --color-surface-muted:    #F8FAFC;   /* Secondary background */
  --color-surface-raised:   #FFFFFF;

  --color-text-primary:     #0F172A;   /* Deep slate for readability */
  --color-text-secondary:   #475569;   /* Muted slate */
  --color-text-dim:         #94A3B8;

  --color-border:           #E2E8F0;
  --color-border-hover:     #CBD5E1;

  --color-error:            #EF4444;
  --color-error-soft:       #FEF2F2;
  --color-success:          #10B981;
  --color-success-soft:     #ECFDF5;
  --color-warning:          #F59E0B;
  --color-warning-soft:     #FFFBEB;

  --sidebar-bg: linear-gradient(180deg, #0A192F 0%, #060F1E 100%);
  --sidebar-text: #94A3B8;
  --sidebar-active: #FFFFFF;
  --sidebar-hover-bg: rgba(255, 255, 255, 0.05);
  --sidebar-active-bg: rgba(255, 255, 255, 0.1);

  /* ─── Typography (System-first for performance & trust) ─── */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  
  --text-xs:   0.75rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.25rem;
  --text-2xl:  1.5rem;
  --text-3xl:  1.875rem;
  --text-4xl:  2.25rem;
  --text-5xl:  3rem;

  /* ─── Layout & Spacing ─── */
  --container-width: 1200px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 20px;
  --radius-full: 9999px;

  --space-1: 0.25rem;  --space-2: 0.5rem;   --space-3: 0.75rem;
  --space-4: 1rem;     --space-5: 1.25rem;  --space-6: 1.5rem;
  --space-8: 2rem;     --space-10: 2.5rem;  --space-12: 3rem;
  --space-16: 4rem;    --space-20: 5rem;    --space-24: 6rem;

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
}

/* ─── Base Styles ─── */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    background-color: var(--color-surface);
    color: var(--color-text-primary);
    font-family: var(--font-sans);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--space-6);
    width: 100%;
}

/* ─── Components ─── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-3) var(--space-8);
    font-weight: 600;
    font-size: var(--text-sm);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    	border: 1px solid transparent;
	gap: var(--space-2);
}

@media (max-width: 768px) {
    .btn { min-height: 44px; } /* Large touch targets for mobile */
}

.btn-primary {
    background-color: var(--color-primary);
    color: var(--color-primary-contrast);
}
.btn-primary:hover {
    background-color: var(--color-primary-hover);
    box-shadow: var(--shadow-sm);
}

.btn-secondary {
    background-color: var(--color-surface);
    color: var(--color-text-primary);
    border-color: var(--color-border);
}
.btn-secondary:hover {
    background-color: var(--color-surface-muted);
    border-color: var(--color-text-dim);
}

.card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-8);
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}
.card:hover {
    border-color: var(--color-border-hover);
    box-shadow: var(--shadow-md);
}

/* ─── Navigation ─── */
.nav {
    height: 72px;
    display: flex;
    align-items: center;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-link {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: var(--text-sm);
    transition: color 0.2s ease;
}
.nav-link:hover {
    color: var(--color-primary);
}

/* ─── Typography & Utilities ─── */
h1 { font-size: clamp(2rem, 5vw, 3rem); font-weight: 800; line-height: 1.1; letter-spacing: -0.04em; }
h2 { font-size: clamp(1.5rem, 4vw, 1.875rem); font-weight: 700; letter-spacing: -0.02em; }
h3 { font-size: var(--text-xl); font-weight: 700; }

.text-muted { color: var(--color-text-secondary); }
.text-dim { color: var(--color-text-dim); }
.text-primary { color: var(--color-primary); }
.text-secondary { color: var(--color-secondary); }

.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-full);
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.badge-primary { background-color: var(--color-primary-soft); color: var(--color-primary); }
.badge-completed { background-color: var(--color-success-soft); color: var(--color-success); border: 1px solid rgba(16, 185, 129, 0.2); }
.badge-invoiced { background-color: var(--color-warning-soft); color: var(--color-warning); border: 1px solid rgba(245, 158, 11, 0.2); }
.badge-paid { background-color: var(--color-primary-soft); color: var(--color-primary); border: 1px solid rgba(15, 108, 189, 0.2); }
.badge-overdue { background-color: var(--color-error-soft); color: var(--color-error); border: 1px solid rgba(239, 68, 68, 0.2); }

/* Grid Layouts */
.grid-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-8);
}

/* ─── App Layout (Dashboard) ─── */
.app-layout {
    display: flex;
    min-height: 100vh;
    background-color: var(--color-surface-muted);
}

.sidebar {
    width: 280px;
    background: var(--sidebar-bg);
    border-right: none;
    padding: var(--space-6) var(--space-4);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    z-index: 100;
    transition: transform 0.3s ease;
    color: var(--sidebar-text);
    overflow-y: auto;
}

.main-content {
    flex: 1;
    margin-left: 280px;
    padding: var(--space-8) var(--space-12);
    max-width: 1400px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    color: var(--sidebar-text);
    text-decoration: none;
    font-weight: 500;
    font-size: var(--text-sm);
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
    margin-bottom: var(--space-1);
}

.nav-item:hover {
    background-color: var(--sidebar-hover-bg);
    color: var(--sidebar-active);
}

.nav-item.active {
    background-color: var(--sidebar-active-bg);
    color: var(--sidebar-active);
    font-weight: 600;
}

.nav-item svg {
    opacity: 0.7;
}

.nav-item.active svg {
    opacity: 1;
}

/* ─── Topbar ─── */
.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-8);
    flex-wrap: wrap;
    gap: var(--space-4);
}

.topbar-right {
    display: flex;
    align-items: center;
    gap: var(--space-6);
}

.topbar-date {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    font-weight: 500;
}

.notification-btn {
    background: white;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    width: 40px;
    height: 40px;
    display: grid;
    place-items: center;
    cursor: pointer;
    color: var(--color-text-secondary);
    transition: all 0.2s;
}
.notification-btn:hover { background: var(--color-surface-muted); color: var(--color-primary); }

.user-profile {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: var(--color-primary-soft);
    color: var(--color-primary);
    display: grid;
    place-items: center;
    font-weight: 700;
    font-size: var(--text-sm);
    border: 2px solid white;
    box-shadow: 0 0 0 1px var(--color-border);
}

/* ─── Search & Filters ─── */
.search-input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}
.search-input-wrapper svg {
    position: absolute;
    left: var(--space-3);
    color: var(--color-text-dim);
}
.search-input {
    padding: var(--space-2) var(--space-3) var(--space-2) var(--space-10);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: var(--text-sm);
    width: 250px;
    transition: all 0.2s;
}
.search-input:focus { outline: none; border-color: var(--color-primary); box-shadow: 0 0 0 3px var(--color-primary-soft); }

.filter-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    background: white;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all 0.2s;
}
.filter-btn:hover { background: var(--color-surface-muted); color: var(--color-text-primary); }

.stat-card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}
.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-border-hover);
}

/* ─── Skeleton Loading ─── */
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: .5; }
}
.skeleton {
    animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
    background-color: var(--color-border);
    border-radius: var(--radius-sm);
}
.skeleton-text { height: 1rem; width: 60%; margin-bottom: 0.5rem; }
.skeleton-title { height: 2rem; width: 80%; margin-bottom: 0.5rem; }
.skeleton-avatar { height: 2rem; width: 2rem; border-radius: 50%; }

/* ─── Premium Table ─── */
.premium-table { width: 100%; border-collapse: collapse; }
.premium-table th { text-align: left; padding: var(--space-4) var(--space-6); border-bottom: 1px solid var(--color-border); font-size: var(--text-xs); text-transform: uppercase; letter-spacing: 0.05em; color: var(--color-text-dim); font-weight: 600; }
.premium-table td { padding: var(--space-4) var(--space-6); border-bottom: 1px solid var(--color-border); vertical-align: middle; transition: background-color 0.15s ease; }
.premium-table tbody tr:hover td { background-color: var(--color-surface-muted); }
.premium-table tr:last-child td { border-bottom: none; }

/* ─── Responsive Dashboard ─── */
@media (max-width: 1024px) {
    .app-layout {
        flex-direction: column;
    }
    .sidebar {
        transform: translateX(-100%);
        z-index: 200;
    }
    .sidebar.mobile-active {
        transform: translateX(0);
        box-shadow: 4px 0 24px rgba(0,0,0,0.3);
    }
    .main-content {
        margin-left: 0;
        padding: var(--space-6);
        width: 100%;
    }
}

@media (max-width: 768px) {
    /* Transform table to vertical cards */
    .premium-table, .premium-table tbody, .premium-table tr, .premium-table td { display: block; width: 100%; }
    .premium-table thead { display: none; }
    .premium-table tr { padding: var(--space-4); border-bottom: 1px solid var(--color-border); display: flex; flex-direction: column; gap: var(--space-2); }
    .premium-table tr:hover td { background-color: transparent; }
    .premium-table td { padding: 0; border: none; display: flex; justify-content: space-between; align-items: center; text-align: right; }
    .premium-table td::before { content: attr(data-label); font-size: var(--text-xs); color: var(--color-text-dim); text-transform: uppercase; letter-spacing: 0.05em; font-weight: 600; text-align: left; }
}

@media (max-width: 640px) {
    .main-content {
        padding: var(--space-4);
    }
    .btn {
        width: 100%;
        padding: var(--space-3) var(--space-4);
    }
    header[style*="justify-content: space-between"] {
        flex-direction: column;
        align-items: flex-start !important;
    }
}

/* ─── Animations ─── */
@keyframes spin { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }
.animate-spin { animation: spin 1s linear infinite; }

.htmx-indicator { opacity: 0; transition: opacity 0.2s ease; }
.htmx-request .htmx-indicator { opacity: 1; }
.htmx-request.htmx-indicator { opacity: 1; }

/* ─── Mobile Support ─── */
.mobile-header {
    display: none;
    padding: var(--space-4);
    background: white;
    border-bottom: 1px solid var(--color-border);
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 200;
}

@media (max-width: 1024px) {
    .mobile-header {
        display: flex;
    }
}



/* ─── Components ─── */
.error-banner {
    display:          flex;
    align-items:      center;
    justify-content:  space-between;
    gap:              0.75rem;
    padding:          0.75rem 1rem;
    background-color: var(--color-error-bg, #fef2f2);
    color:            var(--color-error-text, #991b1b);
    border:           1px solid var(--color-error-border, #fecaca);
    border-radius:    var(--radius-md, 0.5rem);
    font-size:        0.875rem;
    margin-bottom:    1rem;
}

.error-banner button {
    background: none;
    border:     none;
    cursor:     pointer;
    font-size:  1.25rem;
    color:      inherit;
    padding:    0;
    line-height: 1;
}

/* ─── FAQ Accordion (details/summary) ─── */
details summary::-webkit-details-marker { display: none; }
details summary { cursor: pointer; user-select: none; }
details[open] > summary > span:last-child { transform: rotate(45deg); display: inline-block; transition: transform 0.2s ease; }
details > summary > span:last-child { transition: transform 0.2s ease; }
details[open] { border-color: var(--color-primary) !important; }

/* ─── Compare section responsive ─── */
@media (max-width: 768px) {
    [style*="grid-template-columns: 1fr 1fr"] {
        grid-template-columns: 1fr !important;
    }
}