/* ============================================
   PERCENTILES CUBANOS - Sistema de Diseño
   Adaptado del design system de CliniCalc
   ============================================ */

/* === VARIABLES CSS === */
:root {
    /* Colores Brand */
    --brand-primary: #1e3872;
    --brand-primary-dark: #13294f;
    --brand-primary-light: #2d4a8c;
    --brand-accent: #78daab;
    --brand-accent-dark: #5bc492;
    --brand-accent-light: #9ae4c1;

    /* Colores Semánticos */
    --success: #10b981;
    --success-dark: #059669;
    --danger: #ef4444;
    --danger-dark: #dc2626;
    --warning: #f59e0b;
    --warning-light: #fbbf24;
    --info: #3b82f6;

    /* Fondos Modo Claro */
    --bg-body: #f8fafc;
    --bg-card: #ffffff;
    --bg-secondary: #f1f5f9;
    --bg-tertiary: #e2e8f0;
    --input-bg: #ffffff;

    /* Texto Modo Claro */
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-tertiary: #94a3b8;

    /* Bordes */
    --border-color: #e2e8f0;
    --border-color-strong: #cbd5e1;

    /* Sombras */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);

    /* Otros */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;

    /* Transiciones */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* === MODO OSCURO (por defecto) === */
body.dark-mode {
    --bg-body: #0f172a;
    --bg-card: #1e293b;
    --bg-secondary: #334155;
    --bg-tertiary: #475569;
    --input-bg: #1e293b;

    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-tertiary: #94a3b8;

    --border-color: #334155;
    --border-color-strong: #475569;

    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6);
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-body);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* === SCROLLBAR === */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg-tertiary); border-radius: 4px; }
::-webkit-scrollbar-thumb { background: var(--border-color-strong); border-radius: 4px; transition: background var(--transition-fast); }
::-webkit-scrollbar-thumb:hover { background: var(--brand-accent); }

/* === APP CONTAINER === */
.app-container {
    max-width: 100%;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    opacity: 0;
    animation: fadeIn 0.4s ease forwards;
}

/* === HEADER === */
.app-header {
    background: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    padding: 16px 20px;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
    transition: all var(--transition-normal);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 680px;
    margin: 0 auto;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.app-logo-wrapper {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    background: rgba(120, 218, 171, 0.12);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    flex-shrink: 0;
}

.app-title-group h1 {
    font-size: 17px;
    font-weight: 700;
    letter-spacing: -0.3px;
    color: var(--text-primary);
    line-height: 1.2;
}

.app-title-group p {
    font-size: 11.5px;
    color: var(--text-tertiary);
    font-weight: 500;
}

.header-right {
    display: flex;
    gap: 8px;
    align-items: center;
}

.icon-btn {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.icon-btn:hover { background: var(--bg-tertiary); transform: scale(1.05); }
.icon-btn:active { transform: scale(0.95); }
.icon-btn svg { display: block; }

/* Alterna el ícono sol/luna según el tema */
.icon-sun { display: none; }
body.dark-mode .icon-moon { display: none; }
body.dark-mode .icon-sun { display: block; }

/* === OFFLINE BADGE === */
.offline-badge {
    position: fixed;
    top: 14px;
    right: 14px;
    background: var(--warning);
    color: var(--brand-primary-dark);
    padding: 7px 14px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 700;
    display: none;
    align-items: center;
    gap: 6px;
    z-index: 10000;
    box-shadow: var(--shadow-lg);
    animation: slideDown 0.3s ease;
}

.offline-badge.show { display: flex; }

/* === MAIN CONTENT === */
.app-main {
    flex: 1;
    max-width: 680px;
    width: 100%;
    margin: 0 auto;
    padding: 24px 20px 60px;
}

/* === CARDS === */
.panel-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 20px;
    margin-bottom: 16px;
    box-shadow: var(--shadow-sm);
    transition: border-color var(--transition-normal);
}

.panel-title {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 18px;
    display: flex;
    align-items: center;
    gap: 10px;
}

/* === SEGMENTED CONTROL (sexo) === */
.segmented-control {
    display: flex;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: 4px;
    gap: 4px;
}

.segmented-control input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.segmented-option {
    flex: 1;
    text-align: center;
    padding: 10px 12px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    user-select: none;
}

.segmented-option.selected {
    background: var(--brand-accent);
    color: var(--brand-primary-dark);
    box-shadow: var(--shadow-sm);
}

/* === FORM === */
.form-group { margin-bottom: 16px; }
.form-group:last-child { margin-bottom: 0; }

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    font-size: 13.5px;
    color: var(--text-secondary);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.form-row .form-group { margin-bottom: 0; }

.form-input {
    width: 100%;
    padding: 12px 14px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--input-bg);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 15px;
    transition: all var(--transition-fast);
}

.form-input:focus {
    outline: none;
    border-color: var(--brand-accent);
    box-shadow: 0 0 0 3px rgba(120, 218, 171, 0.15);
}

.form-input::placeholder { color: var(--text-tertiary); opacity: 0.7; }

select.form-input {
    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='%2394a3b8' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
    cursor: pointer;
}

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

/* === ALERT / INFO BOX === */
.alert-box {
    padding: 14px 16px;
    border-radius: var(--radius-md);
    font-size: 13px;
    line-height: 1.6;
    border-left: 4px solid;
}

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

.alert-info {
    background: rgba(59, 130, 246, 0.1);
    border-left-color: var(--info);
    color: var(--text-secondary);
}

.alert-warning {
    background: rgba(245, 158, 11, 0.1);
    border-left-color: var(--warning);
    color: var(--text-secondary);
}

.alert-danger {
    background: rgba(239, 68, 68, 0.12);
    border-left-color: var(--danger);
    color: var(--text-secondary);
}

.alert-box ul { margin: 8px 0 0 18px; }
.alert-box li { margin-bottom: 3px; }

/* === BUTTON === */
.btn {
    padding: 14px 24px;
    border-radius: var(--radius-md);
    font-size: 15.5px;
    font-weight: 700;
    font-family: inherit;
    cursor: pointer;
    border: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all var(--transition-fast);
    width: 100%;
}

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

.btn-primary {
    background: linear-gradient(135deg, var(--brand-accent-dark), var(--brand-accent));
    color: var(--brand-primary-dark);
    box-shadow: 0 4px 12px rgba(120, 218, 171, 0.3);
}

.btn-primary:hover {
    box-shadow: 0 6px 16px rgba(120, 218, 171, 0.4);
    transform: translateY(-2px);
}

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

.btn-secondary:hover { background: var(--bg-tertiary); }

/* === CATEGORY COLOR TOKENS (por tipo de medida) === */
[data-category="peso"]                   { --cat-color: #3b82f6; --cat-color-bg: rgba(59,130,246,0.13); }
[data-category="talla"]                  { --cat-color: #8b5cf6; --cat-color-bg: rgba(139,92,246,0.13); }
[data-category="circunferencia_cefalica"]{ --cat-color: #06b6d4; --cat-color-bg: rgba(6,182,212,0.13); }
[data-category="imc"]                    { --cat-color: #22c55e; --cat-color-bg: rgba(34,197,94,0.13); }
[data-category="peso_para_talla"]        { --cat-color: #f59e0b; --cat-color-bg: rgba(245,158,11,0.13); }

/* === RESULT CARD === */
.result-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 22px 20px;
    margin-bottom: 16px;
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
    animation: slideDown 0.35s ease;
}

.result-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 4px;
    background: var(--cat-color, var(--brand-accent));
}

.result-card-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
}

.result-icon-wrapper {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    background: var(--cat-color-bg, rgba(120,218,171,0.12));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 19px;
    flex-shrink: 0;
}

.result-card-header h3 {
    font-size: 15.5px;
    font-weight: 700;
    color: var(--text-primary);
}

.percentile-range {
    font-size: 30px;
    font-weight: 800;
    text-align: center;
    color: var(--cat-color, var(--text-primary));
    margin-bottom: 4px;
    letter-spacing: -0.5px;
}

.percentile-meta {
    text-align: center;
    color: var(--text-tertiary);
    font-size: 13px;
    margin-bottom: 2px;
}

/* === PERCENTILE BAR === */
.percentile-bar-container {
    position: relative;
    height: 36px;
    background: linear-gradient(to right,
        var(--danger) 0%,
        var(--danger) 3%,
        var(--warning) 3%,
        var(--warning) 10%,
        var(--success) 10%,
        var(--success) 90%,
        var(--warning) 90%,
        var(--warning) 97%,
        var(--danger) 97%,
        var(--danger) 100%);
    border-radius: 18px;
    margin: 18px 0 6px;
    overflow: visible;
    opacity: 0.9;
}

.percentile-marker {
    position: absolute;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 4px;
    height: 100%;
    background: var(--text-primary);
    border-radius: 2px;
    box-shadow: 0 0 8px rgba(0,0,0,0.5);
}

.percentile-marker::before {
    content: '';
    position: absolute;
    top: -9px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 7px solid transparent;
    border-right: 7px solid transparent;
    border-top: 10px solid var(--text-primary);
}

.percentile-labels {
    display: flex;
    justify-content: space-between;
    font-size: 10.5px;
    color: var(--text-tertiary);
    font-weight: 600;
    margin-bottom: 16px;
}

/* === INTERPRETATION BOX === */
.interpretation-box {
    background: var(--bg-secondary);
    padding: 14px 16px;
    border-radius: var(--radius-md);
    border-left: 4px solid var(--cat-color, var(--brand-accent));
    font-size: 13.5px;
    color: var(--text-secondary);
    line-height: 1.6;
}

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

.interp-label {
    display: inline-block;
    font-weight: 700;
    padding: 2px 10px;
    border-radius: 20px;
    font-size: 12px;
    margin-bottom: 8px;
}

.interp-success { background: rgba(16,185,129,0.15); color: var(--success); }
.interp-warning { background: rgba(245,158,11,0.15); color: var(--warning); }
.interp-danger  { background: rgba(239,68,68,0.15); color: var(--danger); }

.disclaimer-box {
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid rgba(245, 158, 11, 0.3);
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    margin-top: 12px;
    font-size: 12.5px;
    color: var(--text-secondary);
}

/* === EMPTY / LOADING STATE === */
.loading-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
}

.loading-spinner {
    width: 36px;
    height: 36px;
    margin: 0 auto 16px;
    border: 3px solid var(--border-color);
    border-top-color: var(--brand-accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

/* === TOAST === */
.toast-container {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10001;
    display: flex;
    flex-direction: column;
    gap: 10px;
    width: 90%;
    max-width: 380px;
}

.toast {
    background: var(--bg-card);
    border-left: 4px solid var(--info);
    border-radius: var(--radius-md);
    padding: 14px 16px;
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: center;
    gap: 10px;
    animation: slideDown 0.25s ease;
    font-size: 13.5px;
    color: var(--text-primary);
}

.toast.warning { border-left-color: var(--warning); }
.toast.error { border-left-color: var(--danger); }
.toast.success { border-left-color: var(--success); }

.toast-icon { font-size: 18px; flex-shrink: 0; }

/* === FOOTER === */
.app-footer {
    text-align: center;
    padding: 20px;
    font-size: 11.5px;
    color: var(--text-tertiary);
}

/* === ANIMATIONS === */
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes fadeOut { from { opacity: 1; } to { opacity: 0; } }
@keyframes slideDown {
    from { transform: translateY(-14px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}
@keyframes spin { to { transform: rotate(360deg); } }

/* === UPDATE BANNER === */
@keyframes bannerSlideUp {
    from { transform: translateY(100%); opacity: 0; }
    to   { transform: translateY(0);    opacity: 1; }
}
@keyframes bannerSlideDown {
    from { transform: translateY(0);    opacity: 1; }
    to   { transform: translateY(100%); opacity: 0; }
}

.update-banner {
    position: fixed;
    bottom: 16px;
    left: 12px;
    right: 12px;
    background: var(--bg-card);
    border: 1px solid var(--brand-accent);
    border-radius: var(--radius-lg);
    padding: 14px 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    box-shadow: var(--shadow-xl), 0 0 0 1px rgba(120,218,171,0.15);
    z-index: 9999;
    animation: bannerSlideUp 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
    max-width: 600px;
    margin: 0 auto;
}

.update-banner--dismissing {
    animation: bannerSlideDown 0.3s ease forwards;
}

.update-banner__icon {
    font-size: 22px;
    flex-shrink: 0;
    width: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.update-banner__body { flex: 1; min-width: 0; }

.update-banner__title {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 2px;
}

.update-banner__sub {
    font-size: 12px;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.update-banner__actions { display: flex; gap: 8px; flex-shrink: 0; }

.update-btn {
    border: none;
    border-radius: var(--radius-sm);
    padding: 7px 14px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    font-family: inherit;
    transition: all var(--transition-fast);
}

.update-btn--primary { background: var(--brand-accent); color: var(--brand-primary-dark); }
.update-btn--primary:hover { background: var(--brand-accent-light); transform: translateY(-1px); }

.update-btn--secondary { background: var(--bg-secondary); color: var(--text-secondary); }
.update-btn--secondary:hover { background: var(--bg-tertiary); }

/* === RESPONSIVE === */
@media (max-width: 480px) {
    .app-title-group h1 { font-size: 15.5px; }
    .app-main { padding: 20px 14px 48px; }
    .panel-card { padding: 16px; }
    .percentile-range { font-size: 26px; }
}