/* Design System Variables */
:root {
    /* Brand Colors - Light (Default) */
    --color-primary: #0B3C5D;
    --color-primary-dark: #082d46;
    --color-primary-light: #eff6ff;
    --color-secondary: #2E2E2E;
    --color-accent: #B11226;
    --color-success: #059669;
    --color-neutral-light: #F3F4F6;
    --color-white: #FFFFFF;
    --color-background: #F9FAFB;
    --color-text-main: #2E2E2E;
    --color-text-secondary: #6B7280;
    --color-border: #E5E7EB;

    /* Typography */
    --font-heading: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Courier New', monospace;

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

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);

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

/* Dark Mode Variables */
:root[data-theme="dark"] {
    --color-primary: #3b82f6;
    --color-primary-dark: #60a5fa;
    --color-primary-light: #1e3a8a;
    --color-secondary: #9ca3af;
    --color-background: #111827;
    --color-white: #1f2937;
    --color-border: #374151;
    --color-text-main: #f9fafb;
    --color-text-secondary: #9ca3af;
    --color-neutral-light: #111827;
}

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

body {
    font-family: var(--font-body);
    color: var(--color-text-main);
    background-color: var(--color-neutral-light);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

img,
picture,
video,
canvas,
svg {
    display: block;
    max-width: 100%;
}

input,
button,
textarea,
select {
    font: inherit;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    color: var(--color-primary);
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: 2.25rem;
}

h2 {
    font-size: 1.875rem;
}

h3 {
    font-size: 1.5rem;
}

h4 {
    font-size: 1.25rem;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: var(--color-accent);
}

/* Layout Definitions */
.container {
    width: 100%;
    max-width: 100%;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

.main-layout {
    height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    /* Avoid page scroll for app-like feel */
}

.site-header {
    background-color: var(--color-white);
    box-shadow: var(--shadow-sm);
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--color-border);
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.site-content {
    flex: 1;
    padding: var(--spacing-md) 0;
    overflow: hidden;
}

.site-content>.container {
    height: 100%;
    display: flex;
    flex-direction: column;
}

.site-footer {
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: var(--spacing-xl) 0;
    margin-top: auto;
    text-align: center;
    font-size: 0.875rem;
    opacity: 0.95;
}

/* Card Component */
.card {
    background-color: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: var(--spacing-xl);
    border: 1px solid var(--color-border);
    transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.card-title {
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.card-description {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

/* Button Component */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    border: none;
    text-align: center;
    gap: var(--spacing-sm);
}

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

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

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

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

.btn-accent {
    background-color: var(--color-accent);
    color: var(--color-white);
}

.btn-accent:hover {
    opacity: 0.9;
}

.btn-danger {
    background-color: #DC2626;
    color: var(--color-white);
}

.btn-danger:hover {
    background-color: #B91C1C;
}

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

/* Form Elements */
.form-group {
    margin-bottom: var(--spacing-lg);
}

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

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-size: 1rem;
    transition: border-color 0.2s, box-shadow 0.2s;
    background-color: var(--color-white);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(11, 60, 93, 0.1);
}

.form-textarea {
    min-height: 150px;
    resize: vertical;
    font-family: var(--font-mono);
    /* Monospace for data entry */
    flex: 1;
}

/* Tool Grid Layout */
.tool-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

/* Two Column Layout for Tools */
.tool-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: stretch;
    flex: 1;
    min-height: 0;
    /* Important for flex child with overflow */
}

@media (max-width: 768px) {
    .tool-layout {
        grid-template-columns: 1fr;
    }
}

.tool-panel {
    background-color: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: var(--spacing-lg);
    border: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.tool-panel .form-group {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.tool-panel-header {
    border-bottom: 2px solid var(--color-neutral-light);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
}

.modal.active {
    display: flex;
}

.modal-content {
    background-color: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    width: 100%;
    max-width: 800px;
    max-height: 90vh;
    overflow-y: auto;
    padding: var(--spacing-xl);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

/* Table Styles */
.table-container {
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.data-table th {
    background-color: var(--color-neutral-light);
    color: var(--color-primary);
    font-weight: 600;
    text-align: left;
    padding: var(--spacing-sm) var(--spacing-md);
    border-bottom: 2px solid var(--color-border);
}

.data-table td {
    padding: var(--spacing-sm) var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
    vertical-align: middle;
}

.data-table tr:last-child td {
    border-bottom: none;
}

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

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

.animate-fade-in {
    animation: fadeIn 0.4s ease-out forwards;
}

/* Toast Notification */
.toast {
    position: fixed;
    bottom: var(--spacing-xl);
    right: var(--spacing-xl);
    background-color: #10B981;
    color: white;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    transform: translateY(100px);
    opacity: 0;
    transition: all 0.3s ease-out;
    z-index: 2000;
}

.toast.show {
    transform: translateY(0);
    opacity: 1;
}

/* Tool Specific: Ecocardiografía Options */
.option-group {
    margin-bottom: var(--spacing-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
    background-color: var(--color-neutral-light);
    border-radius: var(--radius-md);
    line-height: 1.4;
}

.option-title {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--color-primary);
    display: inline-flex;
    align-items: center;
    margin-right: var(--spacing-sm);
}

.option-list {
    display: inline-flex;
    flex-wrap: wrap;
    gap: 4px;
    align-items: center;
}

.option-chip {
    padding: 0.15rem 0.6rem;
    background-color: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    color: var(--color-text-main);
    cursor: pointer;
    transition: all 0.2s;
}

.option-chip:hover {
    border-color: var(--color-primary);
    background-color: var(--color-primary-light);
}

.option-chip.selected {
    background-color: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

/* Global Theme Toggle */
.theme-toggle {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    color: var(--color-text-main);
    padding: 0.5rem;
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    font-size: 1rem;
    width: 38px;
    height: 38px;
}

.theme-toggle:hover {
    background-color: var(--color-neutral-light);
    border-color: var(--color-primary);
}

/* Copy Feedback Styles */
.btn-copy-success {
    background-color: var(--color-success) !important;
    color: white !important;
    border-color: var(--color-success) !important;
}

.btn-copy-success i {
    animation: scale-up 0.3s ease-out;
}

@keyframes scale-up {
    0% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.3);
    }

    100% {
        transform: scale(1);
    }
}

/* Scrollbar Styles for Dark Mode */
:root[data-theme="dark"] ::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

:root[data-theme="dark"] ::-webkit-scrollbar-track {
    background: var(--color-background);
}

:root[data-theme="dark"] ::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 4px;
}

:root[data-theme="dark"] ::-webkit-scrollbar-thumb:hover {
    background: var(--color-secondary);
}

.option-chip.selected {
    background-color: var(--color-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
}

.secondary-options {
    margin-top: var(--spacing-xs);
    margin-left: var(--spacing-md);
    padding-left: var(--spacing-md);
    border-left: 2px solid var(--color-border);
    display: none;
}

.secondary-options.visible {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}