:root {
    /* Colors - CliniGuía Teal/Blue Palette */
    --primary-color: #0d9488;
    --primary-dark: #0f766e;
    --primary-light: #ccfbf1;
    --secondary-color: #3b82f6;
    /* Accent Blue */
    --background-color: #f8fafc;
    --surface-color: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --error-color: #ef4444;
    --success-color: #22c55e;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);

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

    /* Layout */
    --header-height: 64px;
    --mobile-nav-height: 60px;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-full: 9999px;

    /* Typography */
    --font-family: 'Inter', system-ui, -apple-system, sans-serif;
    --font-heading: 700;
    --font-body: 400;
}

/* Dark Mode Variables */
@media (prefers-color-scheme: dark) {
    :root {
        --background-color: #0f172a;
        --surface-color: #1e293b;
        --text-primary: #f1f5f9;
        --text-secondary: #94a3b8;
        --border-color: #334155;
    }
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: var(--font-family);
    background-color: var(--background-color);
    color: var(--text-primary);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    padding-bottom: var(--mobile-nav-height);
    /* Space for mobile nav */
}

@media (min-width: 768px) {
    body {
        padding-bottom: 0;
    }
}

#app {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Header & Navigation */
.app-header {
    background-color: var(--surface-color);
    border-bottom: 1px solid var(--border-color);
    height: var(--header-height);
    padding: 0 var(--spacing-md);
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-sm);
    backdrop-filter: blur(8px);
    background-color: rgba(255, 255, 255, 0.9);
}

@media (prefers-color-scheme: dark) {
    .app-header {
        background-color: rgba(30, 41, 59, 0.9);
    }
}

.logo {
    color: var(--primary-color);
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Desktop Nav */
.desktop-nav {
    display: none;
}

@media (min-width: 768px) {
    .desktop-nav {
        display: flex;
        gap: var(--spacing-md);
        align-items: center;
    }

    .nav-link {
        color: var(--text-secondary);
        text-decoration: none;
        font-weight: 500;
        padding: 0.5rem 1rem;
        border-radius: var(--radius-md);
        transition: all 0.2s;
        font-size: 0.95rem;
    }

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

    /* Hide Mobile Nav on Desktop */
    .mobile-nav {
        display: none !important;
    }
}

/* Mobile Nav (Bottom Bar) */
.mobile-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    height: var(--mobile-nav-height);
    background-color: var(--surface-color);
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-around;
    align-items: center;
    z-index: 100;
    box-shadow: 0 -4px 6px -1px rgb(0 0 0 / 0.05);
}

.mobile-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.75rem;
    padding: 4px;
    flex: 1;
    height: 100%;
}

.mobile-nav-item svg {
    width: 24px;
    height: 24px;
    margin-bottom: 2px;
    transition: transform 0.2s;
}

.mobile-nav-item.active {
    color: var(--primary-color);
}

.mobile-nav-item.active svg {
    transform: translateY(-2px);
}

/* Main Content */
#main-content {
    flex: 1;
    padding: var(--spacing-md);
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

.loading-spinner {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 200px;
    color: var(--text-secondary);
}

/* PWA Install Button */
.pwa-toast {
    position: fixed;
    bottom: calc(var(--mobile-nav-height) + var(--spacing-md));
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--surface-color);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    z-index: 900;
    border: 1px solid var(--border-color);
    width: 90%;
    max-width: 400px;
    animation: slideUp 0.3s ease-out;
}

@media (min-width: 768px) {
    .pwa-toast {
        bottom: var(--spacing-lg);
    }
}

@keyframes slideUp {
    from {
        transform: translate(-50%, 100%);
        opacity: 0;
    }

    to {
        transform: translate(-50%, 0);
        opacity: 1;
    }
}

.hidden {
    display: none !important;
}

/* Buttons & Forms */
button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.05s;
}

button:active {
    transform: scale(0.98);
}

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

/* Utilities */
.text-center {
    text-align: center;
}

.mt-4 {
    margin-top: 1rem;
}

.text-sm {
    font-size: 0.875rem;
}

.text-gray {
    color: var(--text-secondary);
}

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

.font-bold {
    font-weight: 700;
}

.w-full {
    width: 100%;
}

/* Auth Styles (Preserved) */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 80vh;
    padding: var(--spacing-md);
}

.login-card {
    background: var(--surface-color);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 400px;
    border: 1px solid var(--border-color);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
}

.form-group input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: border-color 0.2s;
    background-color: var(--background-color);
    color: var(--text-primary);
}

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

.btn-google {
    background-color: white;
    color: #3c4043;
    border: 1px solid var(--border-color);
    padding: 0.75rem;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: background-color 0.2s;
}

.btn-google:hover {
    background-color: #f8fafc;
}

.divider {
    display: flex;
    align-items: center;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin: 1.5rem 0;
}

.divider::before,
.divider::after {
    content: '';
    flex: 1;
    border-bottom: 1px solid var(--border-color);
}

.divider span {
    padding: 0 0.5rem;
}

.error-message {
    background-color: #fef2f2;
    color: var(--error-color);
    padding: 0.75rem;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    text-align: center;
    border: 1px solid #fee2e2;
}

.btn-primary.w-100 {
    width: 100%;
}

/* Manual Dark Theme Override */
body.dark-theme {
    --background-color: #0f172a;
    --surface-color: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --border-color: #334155;
    background-color: var(--background-color);
    color: var(--text-primary);
}

body.dark-theme .bg-white {
    background-color: var(--surface-color);
    color: var(--text-primary);
    border-color: var(--border-color);
}

body.dark-theme .text-gray-800,
body.dark-theme .text-slate-700 {
    color: var(--text-primary);
}

body.dark-theme .bg-slate-50,
body.dark-theme .bg-slate-100 {
    background-color: #334155;
    color: var(--text-primary);
}