/* ========================================================================
   VITAL X CARE - UNIFIED DESIGN SYSTEM
   Mobile-First, Responsive, Accessible Healthcare Platform
   Version: 2.0 - Consolidated & Optimized
   ======================================================================== */

/* ========== CSS CUSTOM PROPERTIES (Design Tokens) ========== */
:root {
    /* Primary Colors */
    --primary: #0B5FFF;
    --primary-700: #0847C6;
    --primary-600: #0952DB;
    --primary-light: #3D7FFF;
    --accent: #14B8A6;

    /* Backgrounds */
    --bg: #F5F7FB;
    --surface: #FFFFFF;

    /* Text */
    --text: #0F172A;
    --text-muted: #64748B;
    --text-light: #94A3B8;

    /* Borders & Shadows */
    --border: rgba(15, 23, 42, 0.10);
    --border-light: rgba(15, 23, 42, 0.05);
    --shadow-sm: 0 1px 4px rgba(2, 8, 23, 0.04);
    --shadow-md: 0 12px 30px rgba(2, 8, 23, 0.08);
    --shadow-lg: 0 16px 40px rgba(2, 8, 23, 0.12);

    /* Status Colors */
    --success: #16A34A;
    --success-bg: rgba(22, 163, 74, 0.1);
    --success-text: #065F46;
    --warning: #F59E0B;
    --warning-bg: rgba(245, 158, 11, 0.1);
    --warning-text: #92400E;
    --danger: #EF4444;
    --danger-bg: rgba(239, 68, 68, 0.1);
    --danger-text: #991B1B;
    --info: #0B5FFF;
    --info-bg: rgba(11, 95, 255, 0.1);
    --info-text: #0847C6;

    /* Spacing System (8px base) */
    --space-1: 8px;
    --space-2: 16px;
    --space-3: 24px;
    --space-4: 32px;
    --space-5: 40px;
    --space-6: 48px;
    --space-8: 64px;
    --space-12: 96px;
    --space-16: 128px;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-pill: 999px;

    /* Typography */
    --font-base: 16px;
    --font-family: 'Inter', system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
    --line-height-tight: 1.2;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.6;

    /* Container */
    --container-max: 1120px;
    --container-padding: var(--space-3);

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.2s ease;
    --transition-slow: 0.3s ease;

    /* Z-Index Scale */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-tooltip: 1060;
}

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

html {
    font-size: var(--font-base);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 1rem;
    font-weight: 400;
    line-height: var(--line-height-relaxed);
    color: var(--text);
    background-color: var(--bg);
    min-height: 100vh;
}

/* ========== TYPOGRAPHY SYSTEM ========== */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 800;
    line-height: var(--line-height-tight);
    color: var(--text);
    margin-bottom: var(--space-3);
}

/* Mobile-first fluid typography */
h1 {
    font-size: clamp(2rem, 5vw + 1rem, 2.75rem);
    letter-spacing: -0.02em;
}

h2 {
    font-size: clamp(1.625rem, 4vw + 0.5rem, 2rem);
    letter-spacing: -0.01em;
}

h3 {
    font-size: clamp(1.25rem, 2vw + 0.5rem, 1.5rem);
    font-weight: 700;
}

h4 {
    font-size: 1.125rem;
    font-weight: 700;
}

h5 {
    font-size: 1rem;
    font-weight: 600;
}

h6 {
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

p {
    margin-bottom: var(--space-2);
    line-height: var(--line-height-relaxed);
}

.lead {
    font-size: clamp(1.125rem, 2vw + 0.5rem, 1.25rem);
    font-weight: 500;
    color: var(--text-muted);
    line-height: var(--line-height-normal);
}

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

a:hover {
    color: var(--primary-700);
}

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

/* ========== LAYOUT SYSTEM ========== */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    width: 100%;
}

.section {
    padding: var(--space-6) 0;
}

.section-tight {
    padding: var(--space-4) 0;
}

.page-header {
    text-align: center;
    margin-bottom: var(--space-6);
}

.page-header h1 {
    margin-bottom: var(--space-2);
}

.page-content {
    padding: var(--space-4) 0;
    min-height: 60vh;
}

/* Tablet and up */
@media (min-width: 768px) {
    :root {
        --container-padding: var(--space-4);
    }

    .section {
        padding: var(--space-8) 0;
    }

    .section-tight {
        padding: var(--space-6) 0;
    }

    .page-header {
        margin-bottom: var(--space-8);
    }

    .page-content {
        padding: var(--space-6) 0;
    }
}

/* Desktop and up */
@media (min-width: 1024px) {
    .section {
        padding: var(--space-12) 0;
    }
}

/* ========== GRID SYSTEM ========== */
.grid {
    display: grid;
    gap: var(--space-3);
}

/* Mobile-first: default to 1 column */
.grid-2,
.grid-3,
.grid-4 {
    grid-template-columns: 1fr;
}

/* Tablet: 2 columns for grid-2, grid-3, grid-4 */
@media (min-width: 768px) {
    .grid-2 {
        grid-template-columns: repeat(2, 1fr);
    }

    .grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }

    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Desktop: proper columns */
@media (min-width: 1024px) {
    .grid-2 {
        grid-template-columns: repeat(2, 1fr);
    }

    .grid-3 {
        grid-template-columns: repeat(3, 1fr);
    }

    .grid-4 {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* ========== COMPONENTS: BUTTONS ========== */
.btn {
    /* Touch-friendly minimum size: 48x48px */
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 0 var(--space-3);
    font-size: 1rem;
    font-weight: 600;
    text-align: center;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    white-space: nowrap;
    font-family: inherit;
    line-height: 1;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
    background-color: var(--primary-700);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-primary:active:not(:disabled) {
    transform: translateY(0);
}

.btn-primary:focus-visible {
    outline: none;
    box-shadow: 0 0 0 4px rgba(11, 95, 255, 0.2);
}

.btn-secondary {
    background-color: var(--surface);
    color: var(--primary);
    border: 2px solid var(--border);
}

.btn-secondary:hover:not(:disabled) {
    background-color: var(--bg);
    border-color: var(--primary);
}

.btn-secondary:focus-visible {
    outline: none;
    box-shadow: 0 0 0 4px rgba(11, 95, 255, 0.1);
}

.btn-large {
    min-height: 56px;
    padding: 0 var(--space-4);
    font-size: 1.125rem;
}

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

/* ========== COMPONENTS: CARDS ========== */
.card {
    background-color: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: var(--space-3);
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.card h3 {
    margin-bottom: var(--space-2);
}

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

@media (min-width: 768px) {
    .card {
        padding: var(--space-4);
    }
}

/* ========== COMPONENTS: FORMS ========== */
.form-group {
    margin-bottom: var(--space-3);
}

.form-label,
.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: var(--space-1);
    color: var(--text);
}

.form-input,
.form-select,
.form-textarea,
.form-control,
input[type="text"],
input[type="email"],
input[type="password"],
input[type="tel"],
input[type="number"],
input[type="url"],
select,
textarea {
    width: 100%;
    min-height: 48px;
    padding: 0 var(--space-2);
    font-family: inherit;
    font-size: 1rem;
    color: var(--text);
    background-color: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    transition: all var(--transition-base);
}

.form-textarea,
textarea {
    height: auto;
    padding: var(--space-2);
    resize: vertical;
    min-height: 120px;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus,
.form-control:focus,
input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(11, 95, 255, 0.1);
}

.form-helper {
    display: block;
    margin-top: var(--space-1);
    font-size: 0.875rem;
    color: var(--text-muted);
}

.form-error {
    display: block;
    margin-top: var(--space-1);
    font-size: 0.875rem;
    color: var(--danger);
}

/* ========== COMPONENTS: BADGES ========== */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 6px 12px;
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: var(--radius-pill);
    background-color: var(--info-bg);
    color: var(--primary);
}

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

.badge-warning {
    background-color: var(--warning-bg);
    color: var(--warning);
}

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

/* ========== COMPONENTS: ALERTS ========== */
.alert {
    padding: var(--space-2);
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-3);
    border-left: 4px solid;
}

.alert-success {
    background-color: var(--success-bg);
    border-color: var(--success);
    color: var(--success-text);
}

.alert-warning {
    background-color: var(--warning-bg);
    border-color: var(--warning);
    color: var(--warning-text);
}

.alert-danger,
.alert-error {
    background-color: var(--danger-bg);
    border-color: var(--danger);
    color: var(--danger-text);
}

.alert-info {
    background-color: var(--info-bg);
    border-color: var(--info);
    color: var(--info-text);
}

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

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 64px;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.header-logo {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--primary);
    text-decoration: none;
}

/* Desktop navigation container - HIDDEN on mobile */
.header-nav {
    display: none;
    /* Hidden by default (mobile) */
    align-items: center;
    gap: var(--space-2);
}

.nav-menu {
    display: flex;
    /* Will show when parent is visible */
    list-style: none;
    gap: var(--space-2);
}

.nav-menu a {
    display: flex;
    align-items: center;
    min-height: 48px;
    padding: 0 var(--space-2);
    font-weight: 500;
    color: var(--text);
    transition: color var(--transition-base);
}

.nav-menu a:hover {
    color: var(--primary);
}

.nav-actions {
    display: flex;
    /* Will show when parent is visible */
    gap: var(--space-2);
}

/* Mobile Nav Toggle (Hamburger) */
.nav-toggle {
    display: flex;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-2);
    min-width: 48px;
    min-height: 48px;
    align-items: center;
    justify-content: center;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background-color: var(--text);
    transition: all var(--transition-base);
    display: block;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Menu Overlay */
.mobile-menu-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: var(--z-modal-backdrop);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.mobile-menu-overlay.active {
    display: block;
    opacity: 1;
}

.mobile-menu {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(320px, 80vw);
    background-color: var(--surface);
    box-shadow: var(--shadow-lg);
    z-index: var(--z-modal);
    transform: translateX(100%);
    transition: transform var(--transition-slow);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}

.mobile-menu.active {
    transform: translateX(0);
}

.mobile-menu-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-3);
    border-bottom: 1px solid var(--border);
}

.mobile-menu-close {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 48px;
    min-height: 48px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.5rem;
    color: var(--text);
}

.mobile-menu-body {
    flex: 1;
    padding: var(--space-3);
}

.mobile-menu-body .nav-menu {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.mobile-menu-body .nav-menu a {
    padding: var(--space-2);
    border-radius: var(--radius-sm);
}

.mobile-menu-body .nav-menu a:hover {
    background-color: var(--bg);
}

.mobile-menu-body .nav-actions {
    display: flex;
    flex-direction: column;
    margin-top: var(--space-4);
}

/* Desktop navigation: 1024px and up */
@media (min-width: 1024px) {
    .header-container {
        min-height: 72px;
    }

    .header-logo {
        font-size: 1.5rem;
    }

    /* Show desktop navigation */
    .header-nav {
        display: flex;
    }

    .nav-menu {
        display: flex;
        flex-direction: row;
        gap: var(--space-3);
    }

    .nav-actions {
        display: flex;
        flex-direction: row;
    }

    .nav-toggle {
        display: none;
    }

    .header-nav {
        gap: var(--space-4);
    }
}

/* ========== FOOTER STYLES ========== */
.site-footer {
    background-color: var(--text);
    color: rgba(255, 255, 255, 0.8);
    padding: var(--space-6) 0 var(--space-4);
    margin-top: var(--space-8);
}

.footer-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

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

.footer-column h4 {
    color: var(--surface);
    margin-bottom: var(--space-2);
    font-size: 1rem;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--space-1);
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    transition: color var(--transition-base);
}

.footer-links a:hover {
    color: var(--surface);
}

.footer-bottom {
    padding-top: var(--space-3);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.875rem;
}

.footer-bottom p {
    margin: 0;
}

/* Tablet: 2 columns */
@media (min-width: 768px) {
    .site-footer {
        padding: var(--space-8) 0 var(--space-4);
    }

    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-6);
        margin-bottom: var(--space-6);
    }
}

/* Desktop: 4 columns */
@media (min-width: 1024px) {
    .footer-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* ========== PAGE-SPECIFIC STYLES ========== */

/* Auth Pages */
.auth-page {
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-4) var(--container-padding);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.auth-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-3);
    max-width: 480px;
    width: 100%;
}

.auth-card {
    background: var(--surface);
    padding: var(--space-4);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
}

.auth-header {
    text-align: center;
    margin-bottom: var(--space-4);
}

.auth-header h1 {
    margin-bottom: var(--space-2);
}

.auth-header p {
    color: var(--text-muted);
    margin: 0;
}

.auth-form .form-group {
    margin-bottom: var(--space-3);
}

.form-actions {
    text-align: right;
    margin-bottom: var(--space-3);
}

.forgot-link {
    color: var(--primary);
    text-decoration: none;
    font-size: 0.9375rem;
}

.forgot-link:hover {
    text-decoration: underline;
}

.auth-footer {
    text-align: center;
    margin-top: var(--space-4);
    padding-top: var(--space-3);
    border-top: 1px solid var(--border);
}

.auth-footer p {
    margin: 0;
    color: var(--text-muted);
}

.auth-footer a {
    color: var(--primary);
    font-weight: 600;
}

.auth-info {
    color: var(--surface);
    display: none;
    flex-direction: column;
    justify-content: center;
}

.auth-info h2 {
    color: var(--surface);
    margin-bottom: var(--space-4);
}

.benefits-list {
    list-style: none;
}

.benefits-list li {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-bottom: var(--space-3);
    font-size: 1.125rem;
}

.benefit-icon {
    width: 32px;
    height: 32px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    flex-shrink: 0;
}

@media (min-width: 1024px) {
    .auth-container {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-6);
        max-width: 1000px;
    }

    .auth-card {
        padding: var(--space-6);
    }

    .auth-info {
        display: flex;
    }
}

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

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

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

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

/* Margin utilities */
.mb-0 {
    margin-bottom: 0;
}

.mb-1 {
    margin-bottom: var(--space-1);
}

.mb-2 {
    margin-bottom: var(--space-2);
}

.mb-3 {
    margin-bottom: var(--space-3);
}

.mb-4 {
    margin-bottom: var(--space-4);
}

.mb-6 {
    margin-bottom: var(--space-6);
}

.mb-8 {
    margin-bottom: var(--space-8);
}

.mt-0 {
    margin-top: 0;
}

.mt-1 {
    margin-top: var(--space-1);
}

.mt-2 {
    margin-top: var(--space-2);
}

.mt-3 {
    margin-top: var(--space-3);
}

.mt-4 {
    margin-top: var(--space-4);
}

.mt-6 {
    margin-top: var(--space-6);
}

.mt-8 {
    margin-top: var(--space-8);
}

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

*:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* Reduced motion */
@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;
    }
}

/* ========== ANIMATIONS ========== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

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

.fade-in {
    animation: fadeIn 0.6s ease forwards;
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
    }

    to {
        transform: translateX(0);
    }
}

@keyframes slideOutRight {
    from {
        transform: translateX(0);
    }

    to {
        transform: translateX(100%);
    }
}

/* ========== HOME PAGE SPECIFIC STYLES ========== */
.hero-stats {
    background: linear-gradient(135deg, #0B5FFF 0%, #0847C6 100%);
    color: white;
    padding: var(--space-6) 0;
}

.hero-stats .stat-item {
    padding: var(--space-3);
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    transition: transform var(--transition-base);
}

.hero-stats .stat-item:hover {
    transform: translateY(-4px);
    background: rgba(255, 255, 255, 0.15);
}

.hero-stats h2 {
    color: white;
    margin-bottom: var(--space-2);
    font-size: clamp(2rem, 8vw, 3rem);
    font-weight: 800;
}

.hero-stats p {
    color: rgba(255, 255, 255, 0.95);
    margin: 0;
    font-size: clamp(0.875rem, 3vw, 1.125rem);
    font-weight: 500;
}

.section-bg {
    background-color: var(--surface);
}

.feature-icon {
    font-size: clamp(2.5rem, 5vw, 3rem);
    margin-bottom: var(--space-2);
}

.device-icon {
    font-size: clamp(3rem, 6vw, 4rem);
    margin-bottom: var(--space-2);
}

.testimonial-stars {
    color: #F59E0B;
    margin-bottom: var(--space-2);
    font-size: 1.25rem;
}

.testimonial-text {
    font-style: italic;
    margin-bottom: var(--space-2);
}

.testimonial-role {
    font-size: 0.875rem;
}

.cta-section {
    background: linear-gradient(135deg, #0B5FFF 0%, #0847C6 100%);
    color: white;
}

.cta-section h2 {
    color: white;
}

.cta-lead {
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--space-4);
}

.cta-buttons {
    display: flex;
    gap: var(--space-2);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--space-3);
}

.cta-primary {
    background: white;
    color: var(--primary);
}

.cta-primary:hover {
    background: var(--bg);
    color: var(--primary-700);
}

.cta-secondary {
    border-color: white;
    color: white;
}

.cta-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    color: white;
}

.cta-note {
    margin-top: var(--space-3);
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.875rem;
    margin-bottom: 0;
}