/* ================================
   MWEIN MEDICAL SERVICES
   HEALTHCARE-READY REDESIGN
   Medical Blue Theme | WCAG 2.1 AA
================================ */

/* ================================
   GLOBAL VARIABLES & THEMING
================================ */
:root {
    /* Primary Medical Blue Palette */
    --primary: #0ea5e9;
    --primary-dark: #0284c7;
    --primary-darker: #075985;
    --primary-light: #e0f2fe;
    --primary-lightest: #f0f9fe;

    /* Semantic Colors */
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --info: #3b82f6;

    /* Neutral Scale */
    --dark: #0f172a;
    --dark-secondary: #1e293b;
    --dark-tertiary: #334155;
    --gray: #475569;
    --gray-light: #94a3b8;
    --gray-lighter: #cbd5e1;
    --light: #ffffff;
    --light-bg: #f8fafc;
    --border: #e2e8f0;

    /* Shadows */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 6px 12px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);

    /* Typography */
    --font-system: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'SF Mono', Monaco, 'Cascadia Code', monospace;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    :root {
        --dark: #f8fafc;
        --dark-secondary: #e2e8f0;
        --gray: #94a3b8;
        --light: #0f172a;
        --light-bg: #1e293b;
    }
}

body.dark-mode {
    --dark: #f8fafc;
    --dark-secondary: #e2e8f0;
    --gray: #94a3b8;
    --light: #0f172a;
    --light-bg: #1e293b;
}

/* ================================
   RESET & BASE STYLES
================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    background-color: var(--light);
    color: var(--dark);
    font-family: var(--font-system);
    line-height: 1.6;
    transition: background-color 0.3s, color 0.3s;
    -webkit-font-smoothing: antialiased;
}

/* ================================
   ACCESSIBILITY - SKIP LINK
================================ */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary-dark);
    color: white;
    padding: 0.5rem 1rem;
    text-decoration: none;
    z-index: 100;
}

.skip-link:focus {
    top: 0;
}

/* ================================
   CONTAINER & LAYOUT
================================ */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

@media (min-width: 768px) {
    .container {
        padding: 0 var(--spacing-lg);
    }
}

section {
    padding: var(--spacing-3xl) 0;
}

section:nth-child(even) {
    background-color: var(--light-bg);
}

@media (max-width: 768px) {
    section {
        padding: var(--spacing-2xl) 0;
    }
}

/* ================================
   TYPOGRAPHY
================================ */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    color: var(--dark);
    line-height: 1.25;
    margin-bottom: var(--spacing-lg);
    letter-spacing: -0.3px;
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-xl);
}

h3 {
    font-size: 1.5rem;
}

h4 {
    font-size: 1.25rem;
}

p {
    color: var(--gray);
    margin-bottom: var(--spacing-md);
    line-height: 1.75;
}

p:last-child {
    margin-bottom: 0;
}

strong, b {
    font-weight: 700;
    color: var(--dark);
}

/* ================================
   LINKS & TEXT DECORATION
================================ */
a {
    color: var(--primary);
    text-decoration: underline;
    text-decoration-thickness: 2px;
    text-underline-offset: 0.25rem;
    transition: color 0.3s;
}

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

a:hover {
    color: var(--primary-darker);
    text-decoration-thickness: 3px;
}

a:focus {
    outline: 3px solid var(--primary);
    outline-offset: 2px;
    border-radius: 2px;
}

/* Remove underline from buttons */
.btn-primary, .btn-secondary, .btn-tertiary {
    text-decoration: none;
}

/* ================================
   HEADER
================================ */
.header {
    background-color: var(--light);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 50;
    box-shadow: var(--shadow-sm);
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) 0;
}

.logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-dark);
    text-decoration: none;
    margin: 0;
}

/* Navigation */
.nav {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav a {
    color: var(--gray);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    padding: var(--spacing-sm) 0;
    border-bottom: 2px solid transparent;
    transition: color 0.3s, border-color 0.3s;
}

.nav a:hover,
.nav a.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

@media (max-width: 768px) {
    .header .container {
        flex-direction: column;
        gap: var(--spacing-md);
        padding: var(--spacing-md);
    }

    .nav {
        gap: var(--spacing-md);
        justify-content: center;
    }

    .nav a {
        font-size: 0.85rem;
    }
}

/* ================================
   HERO SECTION
================================ */
.hero {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--light);
    padding: 5rem var(--spacing-md);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 60 60"><path d="M30 30m0 30a30 30 0 1 1 0-60 30 30 0 0 1 0 60z" fill="none" stroke="%23ffffff" stroke-width="0.5" opacity="0.05"/></svg>');
    opacity: 0.05;
}

.hero > * {
    position: relative;
    z-index: 2;
}

.hero h2 {
    color: var(--light);
    font-size: 3rem;
    margin-bottom: var(--spacing-lg);
}

.hero .subheading {
    color: rgba(255, 255, 255, 0.95);
    font-size: 1.2rem;
    margin-bottom: var(--spacing-xl);
}

.hero .container {
    max-width: 700px;
}

@media (max-width: 768px) {
    .hero {
        padding: 3rem var(--spacing-md);
    }

    .hero h2 {
        font-size: 2rem;
    }

    .hero .subheading {
        font-size: 1.05rem;
    }
}

/* ================================
   BUTTONS
================================ */
.btn-primary, .btn-secondary, .btn-tertiary {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    border: 2px solid transparent;
    transition: all 0.3s;
    touch-action: manipulation;
    min-height: 44px;
    margin-right: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

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

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

.btn-primary:focus {
    outline: none;
    box-shadow: 0 0 0 4px var(--primary-light);
}

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

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

.btn-tertiary {
    background-color: transparent;
    color: var(--primary);
    border-color: var(--primary);
}

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

@media (max-width: 768px) {
    .btn-primary, .btn-secondary {
        display: block;
        width: 100%;
        margin-right: 0;
    }
}

/* ================================
   GRID LAYOUTS
================================ */
.services-grid {
    display: grid;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

@media (min-width: 768px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

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

.blog-grid {
    display: grid;
    gap: var(--spacing-lg);
}

@media (min-width: 768px) {
    .blog-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ================================
   SERVICE CARD
================================ */
.service-card {
    background-color: var(--light);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: var(--spacing-xl);
    transition: all 0.3s;
    box-shadow: var(--shadow-xs);
}

.service-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
    border-color: var(--primary-light);
}

.service-icon {
    width: 64px;
    height: 64px;
    background-color: var(--primary-light);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
}

.service-icon svg {
    width: 36px;
    height: 36px;
    stroke: var(--primary);
    stroke-width: 2;
    fill: none;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.service-card h3 {
    color: var(--dark);
    margin-bottom: var(--spacing-md);
}

.service-card p {
    color: var(--gray);
    font-size: 0.95rem;
    margin-bottom: 0;
}

/* ================================
   LIST STYLES
================================ */
ul, ol {
    margin-left: 1.5rem;
    margin-bottom: var(--spacing-md);
}

li {
    margin-bottom: var(--spacing-sm);
    line-height: 1.75;
}

.service-list {
    list-style: none;
    margin-left: 0;
}

.service-list li {
    padding-left: 1.5rem;
    position: relative;
}

.service-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success);
    font-weight: bold;
}

/* ================================
   CALLOUTS & NOTES
================================ */
.note {
    background-color: var(--primary-light);
    border-left: 4px solid var(--primary);
    padding: var(--spacing-lg);
    border-radius: 4px;
    color: var(--dark);
    margin: var(--spacing-xl) 0;
    line-height: 1.7;
}

.note strong {
    color: var(--primary-dark);
}

.info-box {
    background-color: #e0f2fe;
    border-left: 4px solid var(--primary);
    padding: var(--spacing-lg);
    border-radius: 4px;
    margin: var(--spacing-xl) 0;
}

/* ================================
   APPOINTMENT SECTION & FORMS
================================ */
.appointment {
    padding: var(--spacing-3xl) 0;
}

.appointment .container {
    max-width: 600px;
}

.appointment h2 {
    text-align: center;
}

form {
    max-width: 600px;
    margin: 0 auto;
}

label {
    display: block;
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    color: var(--dark);
    font-size: 0.95rem;
}

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="date"],
select,
textarea {
    width: 100%;
    padding: var(--spacing-md);
    border: 1px solid var(--border);
    border-radius: 6px;
    font-family: var(--font-system);
    font-size: 1rem;
    background-color: var(--light);
    color: var(--dark);
    transition: border-color 0.3s, box-shadow 0.3s;
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

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

.consent {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    margin: var(--spacing-lg) 0;
}

.consent input[type="checkbox"] {
    width: 20px;
    height: 20px;
    margin-top: 2px;
    cursor: pointer;
}

.consent label {
    margin: 0;
    font-weight: 400;
    color: var(--gray);
}

/* ================================
   FOOTER
================================ */
.footer {
    background-color: var(--dark-secondary);
    color: var(--light);
    padding: var(--spacing-3xl) 0 var(--spacing-lg);
    border-top: 1px solid var(--border);
}

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

.footer p {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-sm);
}

.footer a {
    color: var(--primary);
    text-decoration: none;
}

.footer a:hover {
    text-decoration: underline;
}

/* ================================
   FLOATING ACTION BUTTONS
================================ */
.whatsapp-float,
.dark-toggle {
    position: fixed;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 40;
    border: none;
    transition: all 0.3s;
    box-shadow: var(--shadow-lg);
    touch-action: manipulation;
    font-weight: 600;
    font-size: 12px;
}

.whatsapp-float {
    bottom: 24px;
    right: 24px;
    background-color: #25d366;
    color: white;
    text-decoration: none;
}

.whatsapp-float:hover {
    background-color: #1da857;
    transform: scale(1.1);
}

.dark-toggle {
    bottom: 90px;
    right: 24px;
    background-color: var(--primary);
    color: var(--light);
}

.dark-toggle:hover {
    background-color: var(--primary-dark);
    transform: scale(1.05);
}

@media (max-width: 768px) {
    .whatsapp-float,
    .dark-toggle {
        width: 48px;
        height: 48px;
        bottom: 16px;
        right: 16px;
        font-size: 10px;
    }

    .dark-toggle {
        bottom: 80px;
    }
}

/* ================================
   DARK MODE
================================ */
body.dark-mode {
    background-color: var(--light);
    color: var(--dark);
}

body.dark-mode .header {
    background-color: var(--light);
}

body.dark-mode .service-card,
body.dark-mode .blog-card {
    background-color: var(--light);
}

body.dark-mode section:nth-child(even) {
    background-color: var(--light-bg);
}

body.dark-mode .footer {
    background-color: var(--dark-secondary);
}

/* ================================
   ACCESSIBILITY - REDUCED MOTION
================================ */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* ================================
   PRINT STYLES
================================ */
@media print {
    .header,
    .footer,
    .whatsapp-float,
    .dark-toggle,
    nav,
    form,
    .appointment {
        display: none;
    }

    body {
        background: white;
        color: black;
    }

    h1, h2, h3 {
        page-break-after: avoid;
    }

    p, li {
        page-break-inside: avoid;
    }

    a {
        color: #0066cc;
    }

    .service-card {
        page-break-inside: avoid;
        border: 1px solid #000;
    }

    /* Referral/Lab form templates */
    .referral-form,
    .lab-form {
        border: 1px solid #000;
        padding: 20pt;
        page-break-after: always;
    }

    /* Number formats: MMS/OP/YYYY/XXXX and MMS/LAB/YYYY/MM/XXX */
    .op-number,
    .lab-number {
        font-family: monospace;
        border: 1px solid #000;
        padding: 8pt;
        margin-bottom: 12pt;
    }

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

    th, td {
        border: 1px solid #000;
        padding: 8pt;
        text-align: left;
    }
}

/* ================================
   MOBILE-FIRST RESPONSIVE
================================ */
@media (max-width: 480px) {
    h1 {
        font-size: 1.75rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    h3 {
        font-size: 1.1rem;
    }

    .container {
        padding: 0 var(--spacing-sm);
    }

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

    .nav {
        gap: var(--spacing-sm);
    }

    section {
        padding: var(--spacing-2xl) 0;
    }
}

/* ================================
   UTILITY CLASSES
================================ */
.text-center {
    text-align: center;
}

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

.mt-2 { margin-top: var(--spacing-md); }
.mb-2 { margin-bottom: var(--spacing-md); }
.p-2 { padding: var(--spacing-md); }

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* ================================
   END STYLESHEET
================================ */