/* ==========================================================================
   Intelligent Healthcare System - main stylesheet
   Palette: blue (trust, stability), white & soft gray (clean base),
            green & teal (health, positive actions)
   ========================================================================== */
:root {
    --ihs-primary: #0b4f8a;        /* dark blue: headers, sidebar */
    --ihs-primary-dark: #083a66;
    --ihs-blue: #1f78c8;           /* medium blue: links, primary buttons */
    --ihs-blue-light: #e8f2fb;     /* soft light blue: backgrounds */
    --ihs-accent: #14a39a;         /* teal */
    --ihs-green: #2e9e6a;          /* green */
    --ihs-gray-50: #f5f7fa;        /* soft gray page background */
    --ihs-gray-100: #eef1f5;
    --ihs-border: #dfe5ec;
    --ihs-text: #1d2b3a;
    --ihs-muted: #637386;
    --ihs-radius: 14px;
    --ihs-shadow: 0 2px 10px rgba(16, 42, 67, .06);

    --bs-primary: var(--ihs-blue);
    --bs-primary-rgb: 31, 120, 200;
    --bs-success: var(--ihs-green);
    --bs-success-rgb: 46, 158, 106;
    --bs-info: #4fb3d9;
    --bs-info-rgb: 79, 179, 217;
    --bs-body-color: var(--ihs-text);
    --bs-body-font-family: "Segoe UI", system-ui, -apple-system, Roboto, "Helvetica Neue", Arial, sans-serif;
    --bs-link-color: var(--ihs-blue);
    --bs-link-color-rgb: 31, 120, 200;
    --bs-border-radius: .6rem;
}

body { background: var(--ihs-gray-50); color: var(--ihs-text); font-size: .95rem; }
.bg-soft { background: var(--ihs-gray-50); }
.bg-blue-light { background: var(--ihs-blue-light) !important; }
.text-primary-dark { color: var(--ihs-primary) !important; }
.text-accent { color: var(--ihs-accent) !important; }
.tiny { font-size: .75rem; }
.min-w-0 { min-width: 0; }
.skip-link { position: absolute; left: 1rem; top: .5rem; z-index: 2000; background: #fff; padding: .5rem 1rem; border-radius: 8px; }

/* Buttons */
.btn-primary { --bs-btn-bg: var(--ihs-blue); --bs-btn-border-color: var(--ihs-blue); --bs-btn-hover-bg: var(--ihs-primary); --bs-btn-hover-border-color: var(--ihs-primary); --bs-btn-active-bg: var(--ihs-primary-dark); --bs-btn-active-border-color: var(--ihs-primary-dark); --bs-btn-disabled-bg: var(--ihs-blue); --bs-btn-disabled-border-color: var(--ihs-blue); }
.btn-success { --bs-btn-bg: var(--ihs-green); --bs-btn-border-color: var(--ihs-green); --bs-btn-hover-bg: #26855a; --bs-btn-hover-border-color: #26855a; }
.btn-accent { background: var(--ihs-accent); border-color: var(--ihs-accent); color: #fff; }
.btn-accent:hover, .btn-accent:focus { background: #0f8a82; border-color: #0f8a82; color: #fff; }
.btn-outline-primary { --bs-btn-color: var(--ihs-blue); --bs-btn-border-color: var(--ihs-blue); --bs-btn-hover-bg: var(--ihs-blue); --bs-btn-hover-border-color: var(--ihs-blue); }
.btn-outline-accent { color: var(--ihs-accent); border-color: var(--ihs-accent); }
.btn-outline-accent:hover { background: var(--ihs-accent); color: #fff; }
.btn { border-radius: .6rem; }
.btn-lg { padding: .8rem 1.4rem; }

/* Cards */
.card { border: 1px solid var(--ihs-border); border-radius: var(--ihs-radius); box-shadow: var(--ihs-shadow); }
.card-header { background: #fff; border-bottom: 1px solid var(--ihs-border); border-radius: var(--ihs-radius) var(--ihs-radius) 0 0 !important; font-weight: 600; padding: .9rem 1.1rem; }
.card-header.header-blue { background: var(--ihs-primary); color: #fff; }
.card-title-sm { font-size: 1rem; font-weight: 600; color: var(--ihs-primary); margin: 0; }

/* Stat cards */
.stat-card { display: flex; flex-direction: row; align-items: center; gap: 1rem; padding: 1.1rem 1.2rem; }
.stat-card .stat-icon { width: 48px; height: 48px; border-radius: 12px; display: grid; place-items: center; font-size: 1.35rem; flex-shrink: 0; }
.stat-card .stat-value { font-size: 1.6rem; font-weight: 700; line-height: 1.1; color: var(--ihs-text); }
.stat-card .stat-label { color: var(--ihs-muted); font-size: .82rem; }
.icon-blue { background: var(--ihs-blue-light); color: var(--ihs-blue); }
.icon-teal { background: #e3f6f4; color: var(--ihs-accent); }
.icon-green { background: #e5f5ed; color: var(--ihs-green); }
.icon-amber { background: #fff4de; color: #c78400; }
.icon-red { background: #fde8e8; color: #c43c3c; }
.icon-gray { background: var(--ihs-gray-100); color: var(--ihs-muted); }

/* Tables */
.table { --bs-table-bg: transparent; margin-bottom: 0; }
.table > thead th { background: var(--ihs-gray-100); color: var(--ihs-primary); font-weight: 600; font-size: .8rem; text-transform: uppercase; letter-spacing: .02em; border-bottom: 1px solid var(--ihs-border); white-space: nowrap; }
.table td { vertical-align: middle; }
.table-hover > tbody > tr:hover > * { background: #f7fbff; }

/* Forms */
.form-label { font-weight: 600; font-size: .88rem; color: var(--ihs-primary); }
.form-control, .form-select { border-radius: .6rem; border-color: #cfd8e3; padding: .55rem .8rem; }
.form-control:focus, .form-select:focus { border-color: var(--ihs-blue); box-shadow: 0 0 0 .2rem rgba(31, 120, 200, .15); }
.required::after { content: " *"; color: #c43c3c; }

/* ------------------------------------------------------------------ App layout */
.app-shell { display: flex; min-height: 100vh; }
.app-sidebar { width: 262px; flex-shrink: 0; background: linear-gradient(180deg, var(--ihs-primary) 0%, var(--ihs-primary-dark) 100%); color: #dce9f6; position: sticky; top: 0; height: 100vh; overflow-y: auto; z-index: 1040; display: flex; flex-direction: column; }
.sidebar-brand { display: flex; align-items: center; padding: 1.1rem 1.1rem .9rem; border-bottom: 1px solid rgba(255,255,255,.08); }
.sidebar-brand .brand-text { color: #fff; font-weight: 700; font-size: 1rem; line-height: 1.2; }
.brand-icon { width: 36px; height: 36px; border-radius: 10px; background: var(--ihs-accent); color: #fff; display: inline-grid; place-items: center; font-size: 1.15rem; flex-shrink: 0; }
.brand-logo { height: 36px; width: auto; max-width: 120px; object-fit: contain; border-radius: 6px; background: #fff; }
.sidebar-user { display: flex; align-items: center; gap: .75rem; margin: .9rem; padding: .75rem; border-radius: 12px; background: rgba(255,255,255,.07); color: #fff; }
.avatar { width: 40px; height: 40px; border-radius: 50%; background: var(--ihs-accent); color: #fff; display: grid; place-items: center; font-weight: 700; flex-shrink: 0; }
.avatar-sm { width: 30px; height: 30px; font-size: .85rem; }
.role-pill { display: inline-block; font-size: .7rem; padding: .1rem .5rem; border-radius: 20px; background: rgba(255,255,255,.15); color: #e3f1ff; }
.role-pill.role-lead { background: #f2c14e; color: #3b2a00; font-weight: 600; }
.sidebar-nav { padding: .25rem .6rem 1.5rem; flex: 1; }
.sidebar-nav a, .nav-group-toggle, .nav-logout { display: flex; align-items: center; gap: .7rem; width: 100%; padding: .6rem .8rem; color: #d3e3f3; text-decoration: none; border-radius: 10px; font-size: .9rem; background: none; border: 0; text-align: left; }
.sidebar-nav a i, .nav-group-toggle i, .nav-logout i { font-size: 1.05rem; }
.sidebar-nav a:hover, .nav-group-toggle:hover, .nav-logout:hover { background: rgba(255,255,255,.08); color: #fff; }
.sidebar-nav a.active { background: var(--ihs-accent); color: #fff; font-weight: 600; }
.nav-group-toggle .chevron { font-size: .75rem; transition: transform .2s; }
.nav-group-toggle.collapsed .chevron { transform: rotate(-90deg); }
.submenu { padding-left: 2.2rem; margin: .1rem 0 .3rem; }
.submenu a { padding: .4rem .7rem; font-size: .85rem; }
.nav-logout { color: #ffc9c9; margin-top: .5rem; }

.app-main { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.app-topbar { position: sticky; top: 0; z-index: 1030; display: flex; align-items: center; gap: .5rem; background: #fff; padding: .7rem 1.25rem; border-bottom: 1px solid var(--ihs-border); box-shadow: 0 1px 4px rgba(16,42,67,.04); }
.topbar-title { font-size: 1.15rem; font-weight: 700; color: var(--ihs-primary); }
.app-content { padding: 1.25rem 1.25rem 2rem; flex: 1; }
.app-footer { display: flex; justify-content: space-between; gap: 1rem; padding: .9rem 1.25rem; font-size: .8rem; color: var(--ihs-muted); border-top: 1px solid var(--ihs-border); background: #fff; }
.notif-dropdown { width: 340px; max-width: 92vw; }
.notif-item { white-space: normal; border-bottom: 1px solid var(--ihs-gray-100); padding: .6rem 1rem; }
.notif-item.unread { background: var(--ihs-blue-light); }
.sidebar-backdrop { display: none; }

@media (max-width: 991.98px) {
    .app-sidebar { position: fixed; left: 0; top: 0; transform: translateX(-100%); transition: transform .25s ease; }
    body.sidebar-open .app-sidebar { box-shadow: 0 0 30px rgba(0,0,0,.25); }
    body.sidebar-open .app-sidebar { transform: translateX(0); }
    body.sidebar-open .sidebar-backdrop { display: block; position: fixed; inset: 0; background: rgba(8, 30, 52, .45); z-index: 1035; }
    .app-content { padding: 1rem .9rem 2rem; }
}

/* Page header inside content */
.page-head { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: .75rem; margin: .5rem 0 1.1rem; }
.page-head h2 { font-size: 1.35rem; font-weight: 700; color: var(--ihs-primary); margin: 0; }
.page-head p { margin: 0; color: var(--ihs-muted); }

/* Welcome banner */
.welcome-banner { background: linear-gradient(120deg, var(--ihs-primary) 0%, var(--ihs-blue) 60%, var(--ihs-accent) 130%); color: #fff; border-radius: var(--ihs-radius); padding: 1.4rem 1.5rem; }
.welcome-banner h2 { font-size: 1.4rem; font-weight: 700; }
.quick-action { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: .45rem; text-align: center; padding: 1.1rem .6rem; background: #fff; border: 1px solid var(--ihs-border); border-radius: var(--ihs-radius); color: var(--ihs-text); text-decoration: none; font-weight: 600; font-size: .88rem; height: 100%; transition: all .15s; }
.quick-action i { font-size: 1.6rem; color: var(--ihs-blue); }
.quick-action:hover { border-color: var(--ihs-accent); box-shadow: 0 6px 16px rgba(20,163,154,.15); transform: translateY(-2px); color: var(--ihs-primary); }
.quick-action:hover i { color: var(--ihs-accent); }

/* Disclaimer */
.disclaimer { border-left: 5px solid #d99a00; background: #fff8e6; color: #5a4300; border-radius: 10px; padding: 1rem 1.1rem; }
.disclaimer strong { color: #7a5900; }

/* Prediction result */
.prediction-hero { background: var(--ihs-blue-light); border: 1px solid #cfe3f6; border-radius: var(--ihs-radius); padding: 1.4rem; }
.prediction-hero .label { font-size: .8rem; text-transform: uppercase; letter-spacing: .06em; color: var(--ihs-muted); font-weight: 600; }
.prediction-hero .disease { font-size: 2rem; font-weight: 800; color: var(--ihs-primary); }
.confidence-ring { --p: 0; width: 132px; height: 132px; border-radius: 50%; display: grid; place-items: center; background: conic-gradient(var(--ihs-accent) calc(var(--p) * 1%), #dbe7f2 0); flex-shrink: 0; }
.confidence-ring > div { width: 104px; height: 104px; border-radius: 50%; background: #fff; display: grid; place-items: center; text-align: center; }
.confidence-ring strong { font-size: 1.6rem; color: var(--ihs-primary); line-height: 1; }
.progress { height: .6rem; border-radius: 1rem; background: var(--ihs-gray-100); }

/* Symptom picker */
.symptom-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: .7rem; }
.symptom-option { border: 2px solid var(--ihs-border); border-radius: 12px; padding: .75rem .85rem; background: #fff; cursor: pointer; transition: all .15s; }
.symptom-option:hover { border-color: var(--ihs-blue); }
.symptom-option.selected { border-color: var(--ihs-accent); background: #effaf8; }
.symptom-option .form-check-input { width: 1.3em; height: 1.3em; margin-top: .1em; }
.symptom-option .form-check-input:checked { background-color: var(--ihs-accent); border-color: var(--ihs-accent); }
.symptom-option .severity { display: none; margin-top: .55rem; }
.symptom-option.selected .severity { display: flex; }
.severity .btn { font-size: .78rem; padding: .25rem .5rem; }
.selected-counter { position: sticky; bottom: 0; z-index: 5; background: #fff; border-top: 1px solid var(--ihs-border); padding: .8rem 1rem; border-radius: 0 0 var(--ihs-radius) var(--ihs-radius); }

/* Booking slots */
.slot-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(96px, 1fr)); gap: .5rem; }
.slot-btn { border: 2px solid #cfe3f6; background: #fff; color: var(--ihs-primary); border-radius: 10px; padding: .55rem .3rem; font-weight: 600; font-size: .9rem; width: 100%; }
.slot-btn:hover:not(:disabled) { border-color: var(--ihs-accent); }
.btn-check:checked + .slot-btn { background: var(--ihs-accent); border-color: var(--ihs-accent); color: #fff; }
.slot-btn:disabled, .slot-btn.disabled { background: var(--ihs-gray-100); border-color: var(--ihs-gray-100); color: #a2adb9; text-decoration: line-through; cursor: not-allowed; }
.date-chip { border: 2px solid #cfe3f6; border-radius: 12px; padding: .45rem .7rem; text-align: center; min-width: 78px; background: #fff; color: var(--ihs-primary); text-decoration: none; display: inline-block; }
.date-chip small { display: block; font-size: .7rem; color: var(--ihs-muted); }
.date-chip.active, .date-chip:hover { border-color: var(--ihs-accent); background: #effaf8; }
.date-strip { display: flex; gap: .5rem; overflow-x: auto; padding-bottom: .4rem; }
.step-indicator { display: flex; gap: .5rem; flex-wrap: wrap; margin-bottom: 1rem; }
.step-indicator .step { display: flex; align-items: center; gap: .4rem; font-size: .85rem; color: var(--ihs-muted); }
.step-indicator .step .num { width: 26px; height: 26px; border-radius: 50%; background: var(--ihs-gray-100); display: grid; place-items: center; font-weight: 700; }
.step-indicator .step.done .num, .step-indicator .step.current .num { background: var(--ihs-accent); color: #fff; }
.step-indicator .step.current { color: var(--ihs-primary); font-weight: 600; }

/* Doctor card */
.doctor-card .doc-avatar { width: 58px; height: 58px; border-radius: 16px; background: var(--ihs-blue-light); color: var(--ihs-blue); display: grid; place-items: center; font-size: 1.6rem; }
.specialty-badge { background: #e3f6f4; color: #0d7069; font-weight: 600; }

/* Timeline (medical records) */
.timeline { position: relative; padding-left: 1.6rem; }
.timeline::before { content: ""; position: absolute; left: .45rem; top: .3rem; bottom: .3rem; width: 2px; background: var(--ihs-border); }
.timeline-item { position: relative; margin-bottom: 1rem; }
.timeline-item::before { content: ""; position: absolute; left: -1.38rem; top: .35rem; width: .8rem; height: .8rem; border-radius: 50%; background: var(--ihs-accent); border: 2px solid #fff; box-shadow: 0 0 0 2px var(--ihs-accent); }

/* ------------------------------------------------------------------ Public pages */
.public-nav { background: #fff; border-bottom: 1px solid var(--ihs-border); }
.public-nav .nav-link { color: var(--ihs-primary); font-weight: 500; }
.hero { background: radial-gradient(circle at 85% 20%, rgba(20,163,154,.18), transparent 45%), linear-gradient(180deg, var(--ihs-blue-light) 0%, #fff 100%); padding: 4rem 0 3rem; }
.hero h1 { font-size: clamp(1.8rem, 4vw, 2.8rem); font-weight: 800; color: var(--ihs-primary); line-height: 1.15; }
.hero .lead { color: #3d5166; }
.hero-card { background: #fff; border-radius: 20px; box-shadow: 0 18px 40px rgba(11,79,138,.12); padding: 1.5rem; }
.feature-icon { width: 54px; height: 54px; border-radius: 14px; display: grid; place-items: center; font-size: 1.5rem; }
.section-title { font-weight: 800; color: var(--ihs-primary); }
.public-footer { background: var(--ihs-primary-dark); color: #dce9f6; }
.auth-wrap { min-height: calc(100vh - 70px); display: flex; align-items: center; padding: 2rem 0; background: linear-gradient(180deg, var(--ihs-blue-light), var(--ihs-gray-50)); }
.auth-card { border-radius: 18px; overflow: hidden; }
.auth-side { background: linear-gradient(150deg, var(--ihs-primary), var(--ihs-accent)); color: #fff; }

/* Print */
@media print {
    .app-sidebar, .app-topbar, .app-footer, .no-print, .btn, .alert-dismissible .btn-close, .public-nav, .public-footer, .sidebar-backdrop { display: none !important; }
    .app-content { padding: 0 !important; }
    body { background: #fff; font-size: 12px; }
    .card { box-shadow: none; border: 1px solid #ccc; break-inside: avoid; }
    .print-only { display: block !important; }
    a { text-decoration: none; color: inherit; }
}
.print-only { display: none; }