/* ==========================================================================
   Design System & CSS Variables
   ========================================================================== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Libre+Baskerville:ital,wght@0,400;0,700;1,400&display=swap');

:root {
    /* Color Palette */
    --primary: #2a6282;
    --primary-light: #f0f7fb;
    --primary-dark: #1e4a63;
    --secondary: #60a5c5;
    --accent: #22a373;
    --accent-light: #dcfce7;

    --text-main: #0f172a;
    --text-mutted: #64748b;
    --text-light: #94a3b8;
    --text-inverse: #ffffff;

    --bg-main: #f8fafc;
    --bg-card: #ffffff;
    --bg-dark: #0f172a;

    --border-color: #e2e8f0;
    --border-focus: #7fb3d5;

    --success: #166534;
    --warning: #f59e0b;
    --danger: #b91c1c;
    --danger-light: #fee2e2;

    /* Typography */
    --font-family: 'Inter', system-ui, -apple-system, sans-serif;
    --font-heading: 'Libre Baskerville', Georgia, serif;
    --font-size-base: 16px;
    --font-size-sm: 14px;
    --font-size-xs: 12px;
    --font-size-lg: 18px;
    --font-size-xl: 24px;
    --font-size-2xl: 32px;
    --font-size-3xl: 48px;

    /* Spacing */
    --spacing-1: 4px;
    --spacing-2: 8px;
    --spacing-3: 12px;
    --spacing-4: 16px;
    --spacing-5: 24px;
    --spacing-6: 32px;
    --spacing-8: 48px;
    --spacing-12: 64px;

    /* Layout */
    --max-width: 1200px;
    --header-height: 80px;

    /* Shadows & Radii */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --shadow-glow: 0 0 15px rgba(37, 99, 234, 0.3);

    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 0.15s ease-in-out;
    --transition-normal: 0.3s ease-in-out;
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    font-size: var(--font-size-base);
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-main);
    color: var(--text-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main {
    flex: 1;
    margin-top: var(--header-height);
}

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

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

ul {
    list-style: none;
}

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

.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-5);
}

/* ==========================================================================
   Typography
   ========================================================================== */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-main);
}

h1 em,
h2 em,
h3 em,
h4 em,
h5 em,
h6 em {
    font-style: italic;
    font-weight: 700;
    color: var(--text-mutted);
}

h1 {
    font-size: var(--font-size-3xl);
    letter-spacing: -0.02em;
}

h2 {
    font-size: var(--font-size-2xl);
    letter-spacing: -0.01em;
}

h3 {
    font-size: var(--font-size-xl);
}

h4 {
    font-size: var(--font-size-lg);
}

.text-mutted {
    color: var(--text-mutted);
}

.text-center {
    text-align: center;
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    padding: var(--spacing-3) var(--spacing-6);
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all var(--transition-normal);
    border: 2px solid transparent;
    text-align: center;
    white-space: nowrap;
}

.btn:active {
    transform: scale(0.98);
}

.btn-primary {
    background-color: var(--primary);
    color: var(--text-inverse);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    box-shadow: var(--shadow-glow);
    color: var(--text-inverse);
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: var(--bg-card);
    color: var(--primary);
    border-color: var(--primary);
}

.btn-secondary:hover {
    background-color: var(--primary-light);
    transform: translateY(-2px);
}

.btn-ghost {
    background-color: transparent;
    color: var(--text-mutted);
}

.btn-ghost:hover {
    color: var(--primary);
    background-color: var(--primary-light);
}

.btn-block {
    display: flex;
    width: 100%;
}

.btn:disabled,
.btn.disabled {
    opacity: 0.6;
    cursor: not-allowed;
    pointer-events: none;
}

.btn-ghost:disabled,
.btn-ghost.disabled {
    opacity: 1;
    /* Avoid contrast drop from opacity */
    color: #475569;
    /* Darker grey for > 4.5:1 contrast */
    background-color: var(--bg-main);
}

/* ==========================================================================
   Forms & Inputs
   ========================================================================== */
.form-group {
    margin-bottom: var(--spacing-4);
    position: relative;
}

.form-label {
    display: block;
    font-weight: 500;
    margin-bottom: var(--spacing-2);
    font-size: var(--font-size-sm);
    color: var(--text-main);
}

.form-control {
    width: 100%;
    padding: var(--spacing-3) var(--spacing-4);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: var(--font-size-base);
    color: var(--text-main);
    background-color: var(--bg-card);
    transition: all var(--transition-fast);
}

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

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

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

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='%2364748b' 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 var(--spacing-3) center;
    padding-right: var(--spacing-8);
}

/* Form Error States */
.form-group.has-error .form-control {
    border-color: var(--danger);
    background-color: var(--danger-light);
}

.form-group.has-error .form-control:focus {
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.2);
}

.error-message {
    display: none;
    color: var(--danger);
    font-size: var(--font-size-xs);
    margin-top: var(--spacing-1);
    font-weight: 500;
}

.form-group.has-error .error-message {
    display: block;
    animation: fadeIn 0.2s ease-in;
}

/* Radio/Checkbox */
.radio-group {
    display: flex;
    gap: var(--spacing-5);
    margin-top: var(--spacing-2);
}

.radio-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    cursor: pointer;
    font-size: var(--font-size-sm);
}

.radio-input {
    accent-color: var(--primary);
    width: 16px;
    height: 16px;
    cursor: pointer;
}

/* ==========================================================================
   Layout Shell: Header
   ========================================================================== */
.header {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    z-index: 1000;
    transition: all var(--transition-normal);
}

.header.scrolled {
    box-shadow: var(--shadow-sm);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.logo {
    font-size: var(--font-size-xl);
    font-weight: 800;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

.logo span {
    color: var(--text-main);
}

.nav-links {
    display: flex;
    gap: var(--spacing-6);
    align-items: center;
}

.nav-link {
    color: var(--text-mutted);
    font-weight: 500;
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--primary);
    border-radius: var(--radius-full);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
}

.user-dropdown {
    position: relative;
    display: inline-block;
}

.user-chip {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    background-color: var(--primary-light);
    padding: var(--spacing-1) var(--spacing-3) var(--spacing-1) var(--spacing-1);
    border-radius: var(--radius-full);
    font-weight: 500;
    font-size: var(--font-size-sm);
    color: var(--primary-dark);
    cursor: pointer;
    border: none;
    font-family: inherit;
    transition: background-color var(--transition-fast), color var(--transition-fast);
}

.user-chip:hover,
.user-chip:focus-visible {
    background-color: var(--primary);
    color: white;
}

.user-chip:hover .user-avatar,
.user-chip:focus-visible .user-avatar {
    background-color: white;
    color: var(--primary);
}

.user-menu {
    position: absolute;
    top: calc(100% + var(--spacing-2));
    right: 0;
    min-width: 150px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-normal);
    z-index: 1000;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.user-dropdown.active .user-menu,
.user-dropdown:hover .user-menu,
.user-dropdown:focus-within .user-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.user-menu-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    width: 100%;
    padding: var(--spacing-3) var(--spacing-4);
    background: none;
    border: none;
    text-align: left;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-main);
    cursor: pointer;
    transition: background-color var(--transition-fast), color var(--transition-fast);
    font-family: inherit;
}

.user-menu-item:hover,
.user-menu-item:focus-visible {
    background-color: var(--bg-hover);
    color: var(--primary);
    outline: none;
}

.user-menu-item svg {
    opacity: 0.7;
    transition: opacity var(--transition-fast);
}

.user-menu-item:hover svg,
.user-menu-item:focus-visible svg {
    opacity: 1;
}

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background-color: var(--primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-sm);
    font-weight: 600;
}

/* Mobile Nav Toggle */
.mobile-nav-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    color: var(--text-main);
    cursor: pointer;
    padding: var(--spacing-2);
}

/* ==========================================================================
   Layout Shell: Footer
   ========================================================================== */
.footer {
    background-color: var(--bg-dark);
    color: var(--text-light);
    padding: var(--spacing-12) 0 var(--spacing-6);
    margin-top: auto;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-8);
    margin-bottom: var(--spacing-8);
}

.footer-brand .logo {
    color: white;
    margin-bottom: var(--spacing-4);
}

.footer-brand .logo span {
    color: var(--primary);
}

.footer-brand p {
    font-size: var(--font-size-sm);
}

.footer-title {
    color: white;
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-4);
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2);
}

.footer-links a {
    color: var(--text-light);
    font-size: var(--font-size-sm);
}

.footer-links a:hover {
    color: var(--primary);
    padding-left: var(--spacing-1);
}

.footer-bottom {
    padding-top: var(--spacing-6);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    font-size: var(--font-size-sm);
}

/* ==========================================================================
   Badges & Tags
   ========================================================================== */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-success {
    background-color: var(--accent-light);
    color: var(--success);
}

.badge-warning {
    background-color: #fef3c7;
    color: #b45309;
}

.badge-danger {
    background-color: var(--danger-light);
    color: var(--danger);
}

.badge-primary {
    background-color: var(--primary-light);
    color: var(--primary-dark);
}

/* ==========================================================================
   Cards
   ========================================================================== */
.card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
    overflow: hidden;
}

.card:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-5px);
}

/* Doctor Avatars */
img.doc-avatar {
    object-fit: cover;
    border: 3px solid transparent;
    padding: 2px;
    background-color: var(--bg-card);
}

img.doc-avatar.available {
    border-color: var(--success);
}

img.doc-avatar.unavailable {
    border-color: var(--danger);
}

/* ==========================================================================
   Animations
   ========================================================================== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.loader {
    width: 40px;
    height: 40px;
    border: 4px solid var(--primary-light);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: var(--spacing-8) auto;
}

[data-reveal] {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}

[data-reveal].revealed {
    opacity: 1;
    transform: translateY(0);
}

/* ==========================================================================
   Breadcrumbs
   ========================================================================== */
.breadcrumb {
    padding: var(--spacing-3) var(--spacing-5);
    background-color: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    font-size: var(--font-size-sm);
}

.breadcrumb-list {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    list-style: none;
    margin: 0;
    padding: 0;
}

.breadcrumb-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    color: var(--text-mutted);
}

.breadcrumb-item a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
}

.breadcrumb-item a:hover {
    text-decoration: underline;
}

.breadcrumb-item.active {
    color: var(--text-main);
    font-weight: 600;
}

.breadcrumb-separator {
    color: var(--text-light);
    font-size: 12px;
}

/* ==========================================================================
   Floating Widgets (Go to Top & Chat)
   ========================================================================== */
.floating-widgets {
    position: fixed;
    bottom: var(--spacing-6);
    right: var(--spacing-6);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
    z-index: 1000;
}

.widget-btn {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background-color: var(--primary);
    color: white;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-normal);
}

.widget-btn:hover {
    transform: translateY(-5px);
    background-color: var(--primary-dark);
    box-shadow: var(--shadow-xl);
}

.go-top-btn {
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
}

.go-top-btn.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* Chat Popup */
.chat-popup {
    position: fixed;
    bottom: calc(var(--spacing-6) + 70px);
    right: var(--spacing-6);
    width: 350px;
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px) scale(0.95);
    transition: all var(--transition-normal);
    z-index: 1000;
}

.chat-popup.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}

.chat-header {
    background: var(--primary);
    color: white;
    padding: var(--spacing-4);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.chat-header h3 {
    margin: 0;
    font-size: var(--font-size-base);
    color: white;
}

.chat-close {
    background: none;
    border: none;
    color: white;
    font-size: 24px;
    cursor: pointer;
    transition: transform var(--transition-fast);
}

.chat-close:hover {
    transform: scale(1.1);
}

.chat-body {
    padding: var(--spacing-4);
    height: 300px;
    overflow-y: auto;
    background: var(--bg-main);
    display: flex;
    flex-direction: column;
}

.chat-message {
    background: white;
    padding: var(--spacing-2) var(--spacing-3);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-3);
    border: 1px solid var(--border-color);
    font-size: var(--font-size-sm);
    color: var(--text-main);
    box-shadow: var(--shadow-sm);
    max-width: 85%;
    align-self: flex-end;
}

.chat-message.assistant {
    background: var(--primary-light);
    border-color: #dbeafe;
    color: var(--primary-dark);
    align-self: flex-start;
}

.chat-footer {
    padding: var(--spacing-3);
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: var(--spacing-2);
    background: white;
}

.chat-footer input {
    flex: 1;
    padding: var(--spacing-2) var(--spacing-3);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    outline: none;
    font-family: inherit;
    font-size: var(--font-size-sm);
}

.chat-footer button {
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background 0.2s;
    font-size: 18px;
}

.chat-footer button:hover {
    background: var(--primary-dark);
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 1024px) {
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {

    .nav-links,
    .nav-actions-desktop {
        display: none;
    }

    .mobile-nav-toggle {
        display: block;
    }

    .mobile-menu-open .nav-links {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: var(--bg-card);
        padding: var(--spacing-4);
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
    }

    .mobile-menu-open .nav-actions-desktop {
        display: flex;
        position: absolute;
        top: calc(var(--header-height) + 180px);
        /* Adjust based on nav items */
        left: 0;
        right: 0;
        padding: var(--spacing-4);
        background: var(--bg-card);
        justify-content: center;
    }

    h1 {
        font-size: var(--font-size-2xl);
    }

    h2 {
        font-size: var(--font-size-xl);
    }
}

@media (max-width: 480px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }

    .btn {
        width: 100%;
        margin-bottom: var(--spacing-2);
    }
}

@media (prefers-reduced-motion: reduce) {

    *,
    ::before,
    ::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Emergency Call Button */
@keyframes pulse-emergency {
    0% {
        box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.7);
    }

    70% {
        box-shadow: 0 0 0 15px rgba(239, 68, 68, 0);
    }

    100% {
        box-shadow: 0 0 0 0 rgba(239, 68, 68, 0);
    }
}

.btn-emergency {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background-color: var(--danger);
    color: white;
    padding: var(--spacing-3) var(--spacing-6);
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: var(--font-size-sm);
    text-decoration: none;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    animation: pulse-emergency 2s infinite;
    border: 2px solid transparent;
}

.btn-emergency:hover,
.btn-emergency:focus {
    background-color: #dc2626;
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

@media (max-width: 768px) {
    .nav-actions-desktop .btn-emergency span {
        display: none;
    }

    .nav-actions-desktop .btn-emergency svg {
        margin-right: 0 !important;
    }

    .nav-actions-desktop .btn-emergency {
        padding: 8px;
        width: 36px;
        height: 36px;
        border-radius: 50%;
    }

    .mobile-only-btn {
        display: list-item;
    }
}

@media (min-width: 769px) {
    .mobile-only-btn {
        display: none;
    }
}