/* 
   STYLE.CSS — Solitario Triangular
   Hoja de estilos EXTERNA 
   
   Contenido:
   1. CSS Custom Properties (Variables) 
   2. Reset y estilos generales
   3. Header y navegación (con menú hamburguesa)
   4. Secciones principales
   5. Tablero de juego
   6. Panel de estadísticas (CSS Grid avanzado)
   7. Botones
   8. Reglas del juego (CSS Grid auto-fit)
   9. Formulario
   10. Tabla de ranking (responsive)
   11. Footer
   12. Animaciones (@keyframes) 
   13. Media Queries — 3 breakpoints (1024px, 768px, 480px)
   14. Print stylesheet 
   15. Reduced motion — Accesibilidad NUEVO
*/


/*
   1. CSS CUSTOM PROPERTIES (Variables CSS) 
   Las Custom Properties (variables) permiten definir valores
   reutilizables en toda la hoja de estilos.
   
   Sintaxis:
     Definir:  --nombre-variable: valor;
     Usar:     var(--nombre-variable)
   
   Ventajas (UD6 §3 - Diseño responsivo):
     - Un solo lugar para cambiar colores/tamaños
     - Facilita mantener consistencia visual
     - Permite crear "temas" fácilmente
     - Se pueden cambiar con Media Queries
   
   :root es el elemento raíz del documento (equivale a <html>)
   Al definir variables aquí, están disponibles en todo el CSS.
 */

:root {
    /* --- Soft Modern Palette --- */
    --bg-cream: #f6f7f3;
    --text-dark: #101828;
    --text-muted: #98a2b3;
    --green-forest: #0f3d2e;
    --green-mid: #1b5e44;
    --green-lime: #8ae84f;
    --green-gradient: radial-gradient(circle at center, #0f3d2e 0%, #1b5e44 42%, #8ae84f 100%);
    --gradient-pins: radial-gradient(circle at center, #0f3d2e 0%, #1b5e44 40%, #8ae84f 100%);
    --ui-bg-top: #f8f6f2;
    --ui-bg-bottom: #eceae6;
    --ui-surface-top: #f7f5f2;
    --ui-surface-mid: #f2efea;
    --ui-surface-bottom: #e7e3dd;
    --ui-shadow: rgba(16, 24, 40, 0.08);
    --ui-text: #1f2937;
    --ui-text-muted: #6b7280;
    --ui-peg-light: #f7f8fa;
    --ui-peg-mid: #e4e8ee;
    --ui-peg-dark: #cdd3dc;
    --ui-hole-edge: #d9ddd6;
    --ui-hole-core: #b7bec8;

    --color-primario: var(--green-forest);
    --color-primario-claro: var(--green-mid);
    --color-primario-oscuro: #092b20;
    --color-secundario: var(--green-lime);
    --color-secundario-oscuro: #59c66f;

    --color-fondo: var(--bg-cream);
    --color-fondo-seccion: rgba(255, 255, 255, 0.7);
    --color-fondo-tarjeta: rgba(255, 255, 255, 0.8);
    --color-fondo-stats: transparent;
    --color-fondo-form: rgba(255, 255, 255, 0.85);

    --color-texto: var(--text-dark);
    --color-texto-claro: #4b5563;
    --color-texto-blanco: #ffffff;
    --color-texto-suave: var(--text-muted);

    --color-exito: #22c55e;
    --color-exito-oscuro: #15803d;
    --color-error: #ef4444;
    --color-error-fondo: #fee2e2;
    --color-exito-fondo: #dcfce7;

    --color-ficha: #34d399;
    --color-ficha-borde: #059669;
    --color-ficha-hover: #6ee7b7;
    --color-seleccion: #a7f3d0;
    --color-seleccion-borde: #6ee7b7;
    --color-vacia: rgba(148, 163, 184, 0.25);
    --color-vacia-borde: rgba(148, 163, 184, 0.35);
    --color-posicion-borde: rgba(15, 61, 46, 0.4);

    --espaciado-xs: 5px;
    --espaciado-sm: 10px;
    --espaciado-md: 15px;
    --espaciado-lg: 20px;
    --espaciado-xl: 30px;

    --radio-borde: 18px;
    --radio-borde-sm: 10px;
    --radio-borde-lg: 28px;
    --sombra-suave: 0 18px 40px rgba(16, 24, 40, 0.1);
    --sombra-media: 0 24px 56px rgba(16, 24, 40, 0.16);

    --fuente-principal: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text", "Inter", sans-serif;
    --tamano-base: 1rem;
    --tamano-h1: 2.6rem;
    --tamano-h2: 1.8rem;
    --linea-altura: 1.6;

    --transicion-rapida: 0.2s ease;
    --transicion-normal: 0.3s ease;

    --ancho-max-contenido: 900px;
    --ancho-max-seccion: 1000px;
    --ancho-max-formulario: 500px;

    --board-size: clamp(280px, 50vh, 420px);
    --tamano-ficha: clamp(40px, 6vh, 56px);
    --peg-size: var(--tamano-ficha);
    --gap-tablero: clamp(6px, 1vh, 10px);
}


/* 
   2. RESET Y ESTILOS GENERALES
*/

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-padding-top: 20px;
    height: 100%;
    overflow: hidden;
    background: linear-gradient(180deg, var(--ui-bg-top) 0%, var(--ui-bg-bottom) 100%);
}

/* ── Fondo negro con puntitos blancos ── */
body {
    font-family: var(--fuente-principal);
    background-color: transparent;
    background-image:
        radial-gradient(circle at 50% 34%, rgba(255, 255, 255, 0.75) 0%, rgba(255, 255, 255, 0) 52%);
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    color: var(--ui-text);
    line-height: var(--linea-altura);
    min-height: 100vh;
    min-height: 100dvh;
    overflow: hidden;
    position: relative;
    display: flex;
    flex-direction: column;
}

/* Capa puntitos blancos — textura sobre negro (grosor 3x) */
.bg-dots {
    display: none;
}

/* Imágenes flexibles — max-width: 100% evita desbordamiento */
img {
    max-width: 100%;
    height: auto;
}


/* 
   3. HEADER Y NAVEGACIÓN (con menú hamburguesa — UD6 §3)
 */

header {
    background: transparent;
    color: #ffffff;
    text-align: center;
    position: relative;
    flex-shrink: 0;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    padding-top: max(clamp(14px, 2.2vh, 22px), env(safe-area-inset-top));
    padding-bottom: clamp(2px, 0.6vh, 8px);
}

.container {
    max-width: var(--ancho-max-contenido);
    margin: 0 auto;
    padding: 0 var(--espaciado-lg);
    position: relative;
    z-index: 1;
}

header .container {
    text-align: center;
}

/* Language toggle — pill style, top-right (pushed out) */
.lang-selector {
    position: absolute;
    right: -120px;
    top: 50%;
    transform: translateY(-50%);
    display: inline-flex;
    align-items: center;
    gap: 2px;
    height: 30px;
    padding: 0 10px;
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(0, 0, 0, 0.05);
    border-radius: 999px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    font-size: 0.8rem;
    font-weight: 500;
}

.lang-selector a {
    text-decoration: none;
    padding: 0 4px;
    color: #6B7280;
    transition: color 0.2s ease;
}

.lang-selector a:hover {
    color: var(--green-mid);
}

.lang-selector a.active {
    background: linear-gradient(135deg, var(--green-forest), var(--green-mid));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    transition: background 0.2s ease, color 0.2s ease;
}

.lang-selector a.active:hover {
    background: linear-gradient(135deg, var(--green-forest), var(--green-mid), var(--green-lime));
    -webkit-background-clip: text;
    background-clip: text;
}

.lang-sep {
    color: rgba(107, 114, 128, 0.5);
    font-weight: 400;
    font-size: 0.75em;
    user-select: none;
}

main {
    position: relative;
    z-index: 1;
    flex: 1;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

header h1 {
    font-size: clamp(2.2rem, 4.8vh, 3rem);
    letter-spacing: 0.06em;
    text-transform: none;
    font-weight: 800;
    margin-bottom: 0;
    text-shadow:
        0 1px 0 rgba(255, 255, 255, 0.62),
        0 6px 12px rgba(16, 24, 40, 0.18);
}

.title-peg {
    font-weight: 800;
    background: linear-gradient(180deg, #ffffff 0%, #eef2f7 58%, #d7dee8 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    -webkit-text-stroke: 1px rgba(186, 194, 206, 0.58);
}

.title-jump {
    font-weight: 800;
    background: linear-gradient(180deg, #ffffff 0%, #eef2f7 58%, #d7dee8 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    -webkit-text-stroke: 1px rgba(186, 194, 206, 0.58);
}

.subtitulo {
    font-size: clamp(0.9em, 1.4vh, 1.02em);
    color: #6B7076;
    font-weight: 400;
    max-width: 34ch;
    margin-inline: auto;
    text-align: center;
    margin-top: 8px;
    margin-bottom: clamp(8px, 1vh, 10px);
}

/* 
   4. SECCIONES PRINCIPALES
*/

section {
    max-width: var(--ancho-max-seccion);
    margin: 0 auto;
    padding: clamp(10px, 2vh, 20px);
    background-color: transparent;
    position: relative;
    z-index: 1;
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

section h2 {
    color: var(--ui-text);
    text-align: center;
    margin-bottom: var(--espaciado-md);
    font-size: var(--tamano-h2);
    font-weight: 400;
    letter-spacing: 0.02em;
}

section#juego {
    scroll-margin-top: 20px;
}

section#juego h2 {
    display: none;
}

section#juego > p {
    display: none;
}


/* 
   5. TABLERO DE JUEGO (Flexbox — UD6 §3)
*/

.tablero-container {
    display: flex;
    justify-content: center;
    margin: clamp(8px, 1.3vh, 14px) 0 clamp(8px, 1.1vh, 14px);
    padding: clamp(26px, 3.4vh, 40px) clamp(30px, 3.8vw, 50px) clamp(34px, 4.2vh, 52px);
    position: relative;
    flex-shrink: 0;
}

.board-wrap {
    position: relative;
}

/* Onboarding tooltip — derecha del tablero (desktop), Safari-safe */
.onboarding-tooltip {
    position: absolute;
    left: 100%;
    margin-left: 32px;
    top: 8px;
    padding: 10px 14px;
    max-width: 280px;
    font-size: clamp(0.88em, 1.5vh, 0.98em);
    color: var(--ui-text);
    white-space: normal;
    text-align: left;
    z-index: 10;
    opacity: 0;
    pointer-events: none;
    border-radius: 22px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    transition: opacity 0.3s ease-out, transform 0.3s ease-out;
}
.onboarding-tooltip::after {
    content: "";
    position: absolute;
    left: -8px;
    top: 50%;
    transform: translateY(-50%);
    border: 8px solid transparent;
    border-right-color: rgba(255, 255, 255, 0.78);
}
@supports (backdrop-filter: blur(12px)) or (-webkit-backdrop-filter: blur(12px)) {
    .onboarding-tooltip {
        background: rgba(255, 255, 255, 0.78);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
    }
    .onboarding-tooltip::after {
        border-right-color: rgba(255, 255, 255, 0.78);
    }
}
@supports not ((backdrop-filter: blur(12px)) or (-webkit-backdrop-filter: blur(12px))) {
    .onboarding-tooltip {
        background: rgba(255, 255, 255, 0.92);
    }
    .onboarding-tooltip::after {
        border-right-color: rgba(255, 255, 255, 0.92);
    }
}
.onboarding-tooltip.is-visible {
    opacity: 1;
    animation: onboarding-float 2.5s ease-in-out infinite;
}
.onboarding-tooltip.is-visible.is-hiding {
    opacity: 0;
    animation: none;
    transition: opacity 0.4s ease-out;
}
.onboarding-tooltip.is-visible.is-fadeout {
    opacity: 0;
    animation: none;
    transition: opacity 0.4s ease-out;
}
.onboarding-tooltip-text {
    display: block;
    transition: opacity 0.25s ease-out;
}
.onboarding-tooltip-text.is-crossfade {
    opacity: 0;
}
@keyframes onboarding-float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-4px); }
}

/* Onboarding glow — pulso suave verde (peg + hueco) */
.posicion.onboarding-peg {
    animation: onboarding-peg-glow 1.5s ease-in-out infinite;
}
.posicion.onboarding-hole {
    animation: onboarding-hole-glow 1.5s ease-in-out infinite;
}
@keyframes onboarding-peg-glow {
    0%, 100% {
        box-shadow:
            0 10px 16px rgba(16, 24, 40, 0.12),
            0 2px 4px rgba(16, 24, 40, 0.08),
            inset 0 1px 0 rgba(255, 255, 255, 0.88),
            0 0 0 0 rgba(26, 94, 68, 0.4);
    }
    50% {
        box-shadow:
            0 12px 20px rgba(16, 24, 40, 0.16),
            0 2px 4px rgba(16, 24, 40, 0.08),
            inset 0 1px 0 rgba(255, 255, 255, 0.88),
            0 0 20px 2px rgba(26, 94, 68, 0.35);
    }
}
@keyframes onboarding-hole-glow {
    0%, 100% {
        box-shadow:
            inset 0 10px 14px rgba(120, 129, 142, 0.28),
            inset 0 -3px 6px rgba(255, 255, 255, 0.7),
            0 1px 2px rgba(255, 255, 255, 0.45),
            0 0 0 0 rgba(26, 94, 68, 0.35);
    }
    50% {
        box-shadow:
            inset 0 10px 14px rgba(120, 129, 142, 0.28),
            inset 0 -3px 6px rgba(255, 255, 255, 0.7),
            0 1px 2px rgba(255, 255, 255, 0.45),
            0 0 18px 2px rgba(26, 94, 68, 0.4);
    }
}

.tablero {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--gap-tablero);
    position: relative;
    width: var(--board-size);
    max-width: 100%;
    z-index: 1;
}

/* Base triangular con look matte soft-modern */
.tablero::before {
    content: "";
    position: absolute;
    inset: clamp(-74px, -8.2vh, -52px) clamp(-60px, -5.8vw, -44px) clamp(-86px, -9vh, -60px);
    background: linear-gradient(168deg, var(--ui-surface-top) 0%, var(--ui-surface-mid) 45%, #dfdbd4 100%);
    border: 1px solid rgba(210, 205, 196, 0.95);
    clip-path: polygon(
        50% 5%,
        55% 7%,
        58% 12%,
        90% 86%,
        89% 90%,
        85% 93%,
        15% 93%,
        11% 90%,
        10% 86%,
        42% 12%,
        45% 7%
    );
    border-radius: 58px;
    box-shadow:
        0 24px 36px rgba(16, 24, 40, 0.08),
        inset 0 1px 0 rgba(255, 255, 255, 0.7),
        inset 0 -10px 22px rgba(158, 163, 173, 0.2);
    z-index: -2;
}

.tablero::after {
    content: "";
    position: absolute;
    inset: clamp(-52px, -5.8vh, -36px) clamp(-40px, -3.8vw, -28px) clamp(-62px, -6.8vh, -44px);
    clip-path: polygon(
        50% 8%,
        54% 10%,
        57% 15%,
        84% 83%,
        83% 86%,
        80% 88%,
        20% 88%,
        17% 86%,
        16% 83%,
        43% 15%,
        46% 10%
    );
    border-radius: 52px;
    background:
        radial-gradient(circle at 50% 28%, rgba(255, 255, 255, 0.62), rgba(255, 255, 255, 0) 65%),
        linear-gradient(182deg, #f7f5f2 0%, #ebe7e1 100%);
    box-shadow:
        inset 0 0 0 clamp(8px, 0.85vw, 12px) rgba(222, 217, 208, 0.75),
        inset 0 6px 10px rgba(255, 255, 255, 0.6),
        inset 0 -10px 14px rgba(178, 184, 195, 0.22);
    z-index: -1;
    pointer-events: none;
}

.fila {
    display: flex;
    gap: var(--gap-tablero);
}

.posicion {
    width: var(--peg-size);
    height: var(--peg-size);
    border-radius: 50%;
    border: 1px solid rgba(196, 202, 211, 0.9);
    cursor: pointer;
    transition: transform var(--transicion-rapida),
                background-color var(--transicion-normal),
                box-shadow var(--transicion-normal),
                opacity var(--transicion-normal);
    opacity: 1;
}

/* Ficha minimalista soft-modern */
.posicion.ficha {
    background: radial-gradient(circle at 30% 24%, var(--ui-peg-light) 0%, var(--ui-peg-mid) 56%, var(--ui-peg-dark) 100%);
    border-color: rgba(188, 196, 208, 0.95);
    box-shadow:
        0 10px 16px rgba(16, 24, 40, 0.12),
        0 2px 4px rgba(16, 24, 40, 0.08),
        inset 0 1px 0 rgba(255, 255, 255, 0.88);
}

.posicion.vacia {
    background: radial-gradient(circle at 45% 35%, var(--ui-hole-edge) 0%, #c2c9d1 42%, var(--ui-hole-core) 100%);
    border-color: rgba(185, 191, 201, 0.9);
    box-shadow:
        inset 0 10px 14px rgba(120, 129, 142, 0.28),
        inset 0 -3px 6px rgba(255, 255, 255, 0.7),
        0 1px 2px rgba(255, 255, 255, 0.45);
}

.posicion.ficha:hover {
    transform: scale(1.08);
    box-shadow:
        0 12px 20px rgba(16, 24, 40, 0.16),
        0 0 12px rgba(255, 255, 255, 0.38);
}

.posicion.ficha.seleccionada {
    background: radial-gradient(circle at 30% 24%, #ffffff 0%, #eef2f7 58%, #d7dee8 100%);
    transform: scale(1.05);
    box-shadow:
        0 0 0 4px rgba(100, 180, 255, 0.5),
        inset 0 1px 0 rgba(255, 255, 255, 0.88),
        0 2px 6px rgba(0, 0, 0, 0.12);
    transition: all 0.2s ease;
}

.posicion.vacia.movimiento-valido {
    animation: highlight-pulse 1.5s ease-in-out infinite;
    border: 2.5px solid rgba(100, 180, 255, 0.4);
    cursor: pointer;
}

@keyframes highlight-pulse {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(100, 180, 255, 0.4);
        background: rgba(100, 180, 255, 0.08);
    }
    50% {
        box-shadow: 0 0 0 12px rgba(100, 180, 255, 0);
        background: rgba(100, 180, 255, 0.15);
    }
}

.tablero.tiene-seleccion .posicion.ficha:not(.seleccionada) {
    opacity: 0.65;
    transition: opacity 0.2s ease;
}

@keyframes shake-no-move {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-3px); }
    75% { transform: translateX(3px); }
}

.posicion.ficha.no-movimiento {
    animation: shake-no-move 0.3s ease;
}


/* 
   6. PANEL DE ESTADÍSTICAS  CSS Grid avanzado 
   
   ANTES: display: flex + justify-content: space-around
   AHORA: display: grid + grid-template-columns: repeat(3, 1fr)
   
   CSS Grid vs Flexbox:
   - Flexbox: layouts UNIDIMENSIONALES (fila O columna)
   - CSS Grid: layouts BIDIMENSIONALES (filas Y columnas)
   
   repeat(3, 1fr) = 3 columnas de fracción igual
   La unidad 'fr' reparte el espacio proporcionalmente 
 */

.stats-panel {
    display: flex;
    justify-content: center;
    gap: clamp(12px, 2vw, 24px);
    margin: clamp(6px, 1vh, 10px) 0 0;
    padding: 0;
    background-color: transparent;
    flex-shrink: 0;
}

.stat {
    text-align: center;
}

.stat-label {
    display: block;
    font-size: clamp(0.65em, 1.2vh, 0.75em);
    color: var(--ui-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.12em;
}

.stat-valor {
    display: block;
    font-size: clamp(1em, 2vh, 1.2em);
    font-weight: 500;
    color: var(--ui-text);
}


/* 
   7. BOTONES (Flexbox con flex-wrap — UD6 §3)
 */

/* Dock soft-modern glassmorphism */
.controles {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: clamp(14px, 2.2vw, 22px);
    margin-top: clamp(10px, 1.5vh, 15px);
    width: min(340px, 88%);
    margin-inline: auto;
    padding: clamp(10px, 1.2vh, 14px) clamp(18px, 2.4vw, 24px);
    border-radius: 999px;
    background:
        radial-gradient(circle at 50% 28%, rgba(255, 255, 255, 0.62), rgba(255, 255, 255, 0) 65%),
        linear-gradient(182deg, #f7f5f2 0%, #ebe7e1 100%);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(222, 217, 208, 0.75);
    box-shadow:
        inset 0 0 0 1px rgba(255, 255, 255, 0.45),
        0 10px 24px rgba(16, 24, 40, 0.08);
    flex-shrink: 0;
}

.control-btn {
    border-radius: 50%;
    border: 1px solid rgba(197, 205, 216, 0.7);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition:
        transform 0.25s ease,
        box-shadow 0.25s ease,
        background-color 0.25s ease,
        border-color 0.25s ease;
}

/* Botones laterales: minimal, suaves */
.control-btn-sec {
    width: clamp(50px, 6vh, 56px);
    height: clamp(50px, 6vh, 56px);
    background: radial-gradient(circle at 30% 24%, var(--ui-peg-light) 0%, var(--ui-peg-mid) 56%, var(--ui-peg-dark) 100%);
    color: var(--ui-text);
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.85),
        0 8px 14px rgba(16, 24, 40, 0.11);
}

.control-btn-sec:hover {
    transform: translateY(-2px);
    border-color: rgba(176, 184, 197, 0.85);
    box-shadow:
        0 10px 18px rgba(16, 24, 40, 0.12);
}

.control-btn-sec:active {
    transform: translateY(1px);
    box-shadow:
        inset 0 2px 6px rgba(148, 157, 171, 0.22),
        0 4px 8px rgba(16, 24, 40, 0.06);
}

/* Botón central: blanco con acento verde suave */
.control-btn-primary {
    width: clamp(60px, 7vh, 68px);
    height: clamp(60px, 7vh, 68px);
    background: #ffffff;
    border: 1px solid rgba(185, 191, 201, 0.9);
    color: var(--ui-text);
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.88),
        0 10px 18px rgba(16, 24, 40, 0.14),
        0 0 12px rgba(52, 199, 89, 0.2);
}

.control-btn-primary:hover {
    transform: scale(1.05);
    box-shadow:
        0 10px 22px rgba(16, 24, 40, 0.12),
        0 0 20px rgba(123, 191, 154, 0.3);
}

.control-btn-primary:active {
    transform: scale(1.01);
    box-shadow:
        inset 0 2px 6px rgba(148, 157, 171, 0.16),
        0 6px 12px rgba(16, 24, 40, 0.08),
        0 0 12px rgba(123, 191, 154, 0.22);
}

.control-icon {
    font-size: 1.45rem;
    line-height: 1;
    color: inherit;
}

.control-btn-sec .control-icon {
    color: var(--ui-text);
}

.control-btn-primary .control-icon {
    color: var(--ui-text);
}


/* 
   10. FORMULARIO
 */

.formulario {
    max-width: var(--ancho-max-formulario);
    margin: 0 auto var(--espaciado-xl);
    padding: 25px;
    background-color: var(--color-fondo-form);
    border-radius: var(--radio-borde);
    border: 1px solid rgba(148, 163, 184, 0.25);
}

.formulario h3 {
    text-align: center;
    color: var(--color-primario-oscuro);
    margin-bottom: var(--espaciado-lg);
}

.form-grupo {
    margin-bottom: var(--espaciado-md);
}

.form-grupo label {
    display: block;
    margin-bottom: var(--espaciado-xs);
    font-weight: bold;
    color: var(--color-texto-claro);
}

.form-grupo input {
    width: 100%;
    padding: var(--espaciado-sm);
    border: 1px solid #ccc;
    border-radius: var(--radio-borde-sm);
    font-size: var(--tamano-base);
    transition: border-color var(--transicion-normal),
                box-shadow var(--transicion-normal);
}

.form-grupo input:focus {
    outline: none;
    border-color: var(--color-primario-oscuro);
    box-shadow: 0 0 5px rgba(93, 64, 55, 0.3);
}

.mensaje-error {
    display: block;
    color: var(--color-error);
    font-size: 0.8em;
    margin-top: 4px;
    min-height: 18px;
}

.input-error {
    border-color: var(--color-error) !important;
    box-shadow: 0 0 5px rgba(211, 47, 47, 0.3);
}

.input-valido {
    border-color: var(--color-exito-oscuro) !important;
    box-shadow: 0 0 5px rgba(56, 142, 60, 0.3);
}

.mensaje-exito {
    background-color: var(--color-exito-fondo);
    padding: 12px;
    border-radius: var(--radio-borde);
    text-align: center;
    margin: var(--espaciado-md) 0;
    font-weight: bold;
}


/* 
   10. TABLA DE RANKING 
   
   NUEVO: Wrapper con overflow-x: auto
   En móvil, si la tabla no cabe, aparece scroll horizontal.
*/

.tabla-ranking-wrapper {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.tabla-ranking {
    width: 100%;
    border-collapse: collapse;
    margin-top: var(--espaciado-lg);
    min-width: 500px;
}

.tabla-ranking th,
.tabla-ranking td {
    padding: 12px;
    text-align: center;
    border-bottom: 1px solid #e0e0e0;
}

.tabla-ranking th {
    background-color: var(--color-primario);
    color: var(--color-texto-blanco);
    font-weight: bold;
    white-space: nowrap;
}

.tabla-ranking tbody tr:nth-child(even) {
    background-color: #f5f5f5;
}

.tabla-ranking tbody tr:hover {
    background-color: var(--color-fondo-stats);
}


/* 
   11. FOOTER
*/

footer {
    background: transparent;
    color: rgba(31, 41, 55, 0.65);
    text-align: center;
    padding-top: clamp(8px, 1vh, 12px);
    padding-bottom: max(clamp(8px, 1vh, 12px), env(safe-area-inset-bottom));
    padding-left: 0;
    padding-right: 0;
    margin-top: 0;
    position: relative;
    z-index: 1;
    flex-shrink: 0;
}

footer p {
    margin: clamp(2px, 0.3vh, 4px) 0;
    font-size: clamp(0.7em, 1.2vh, 0.85em);
}


/* 
   12. ANIMACIONES (@keyframes) 
   
   @keyframes define animaciones con estados intermedios.
   Se aplican con la propiedad animation.
*/

@keyframes pulso {
    0%   { box-shadow: 0 0 12px rgba(52, 199, 89, 0.24); }
    50%  { box-shadow: 0 0 22px rgba(52, 199, 89, 0.42); }
    100% { box-shadow: 0 0 12px rgba(52, 199, 89, 0.24); }
}

@keyframes aparecer {
    from { opacity: 0; transform: translateY(20px); }
    to   { opacity: 1; transform: translateY(0); }
}

section:not(#juego) {
    animation: aparecer 0.5s ease-out;
}

/* 
   13. MEDIA QUERIES 3 breakpoints 
   
   @media tipo-de-medio and (característica) { reglas }
   
   Breakpoints:
   - Desktop grande: > 1024px (estilos base, sin media query)
   - Tablet / Desktop pequeño: max-width: 1024px — NUEVO
   - Tablet / Móvil: max-width: 768px
   - Móvil pequeño: max-width: 480px
 */

/* TABLET / DESKTOP PEQUEÑO (hasta 1024px)  */
@media screen and (max-width: 1024px) {

    section {
        margin: 0 auto;
        padding: clamp(10px, 1.6vh, 16px);
    }

    .stats-panel {
        gap: var(--espaciado-sm);
    }

    /* clamp(min, preferido, max): tipografía fluida 
       Mejor que cambiar font-size en cada breakpoint */
    header h1 {
        font-size: clamp(1.8em, 5vw, 2.5em);
    }

    section h2 {
        font-size: clamp(1.3em, 3.5vw, 1.8em);
    }
}

/*  TABLET (hasta 768px) */
@media screen and (max-width: 768px) {

    .lang-selector {
        position: fixed;
        right: 16px;
        top: max(14px, env(safe-area-inset-top));
        transform: translateY(0);
    }

    section {
        margin: 0 auto;
        padding: clamp(8px, 1.4vh, 14px);
    }

    .tablero-container {
        padding: clamp(20px, 3.1vh, 32px) clamp(20px, 3.4vw, 34px) clamp(24px, 3.6vh, 36px);
    }

    .stats-panel {
        flex-direction: row;
        gap: 12px;
        margin-top: clamp(16px, 3vh, 24px);
    }

    /* Cambiar variable -> afecta a todo el tablero */
    :root {
        --board-size: clamp(260px, 45vh, 360px);
        --tamano-ficha: clamp(36px, 5vh, 48px);
        --gap-tablero: clamp(5px, 0.8vh, 8px);
    }

    .controles {
        width: min(320px, 90%);
        padding: 10px 16px 12px;
    }
    
    .control-btn-sec {
        width: 56px;
        height: 56px;
    }
    
    .control-btn-primary {
        width: 66px;
        height: 66px;
    }
    
    .control-icon {
        font-size: 1.4rem;
    }

    /* Mobile: tooltip above board, centered, arrow points down */
    .onboarding-tooltip {
        left: 50%;
        margin-left: 0;
        margin-bottom: 12px;
        top: auto;
        bottom: 100%;
        transform: translateX(-50%);
        max-width: min(320px, 90vw);
        text-align: center;
    }
    .onboarding-tooltip::after {
        left: 50%;
        top: auto;
        bottom: -14px;
        transform: translateX(-50%);
        border: 8px solid transparent;
        border-top-color: rgba(255, 255, 255, 0.78);
    }
    @supports not ((backdrop-filter: blur(12px)) or (-webkit-backdrop-filter: blur(12px))) {
        .onboarding-tooltip::after {
            border-top-color: rgba(255, 255, 255, 0.92);
        }
    }
    .onboarding-tooltip.is-visible {
        animation: onboarding-float-mobile 2.5s ease-in-out infinite;
    }
}

@keyframes onboarding-float-mobile {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(-4px); }
}

/*  MÓVIL PEQUEÑO (hasta 480px) */
@media screen and (max-width: 480px) {

    .lang-selector {
        right: 12px;
        top: max(12px, env(safe-area-inset-top));
    }

    :root {
        --board-size: clamp(240px, 40vh, 300px);
        --tamano-ficha: clamp(32px, 4.5vh, 42px);
        --gap-tablero: clamp(4px, 0.7vh, 6px);
    }

    .tablero-container {
        padding: clamp(14px, 2.5vh, 24px) clamp(14px, 2.8vw, 22px) clamp(16px, 2.9vh, 26px);
    }
    
    .controles {
        width: min(300px, 92%);
        padding: 10px 14px 12px;
    }
    
    .control-btn-sec {
        width: 52px;
        height: 52px;
    }
    
    .control-btn-primary {
        width: 62px;
        height: 62px;
    }
    
    .control-icon {
        font-size: 1.2rem;
    }
    
    .stats-panel {
        gap: 10px;
        margin-top: clamp(14px, 2.5vh, 22px);
    }

    .tabla-ranking th,
    .tabla-ranking td {
        padding: 8px 4px;
        font-size: 0.8em;
    }

    .formulario {
        padding: var(--espaciado-md);
        margin-left: 0;
        margin-right: 0;
    }

    .stat-valor {
        font-size: 1.1em;
    }

    .stat-label {
        font-size: 0.68em;
    }
}


/* 
   14. PRINT STYLESHEET — @media print 
   
   tipo-de-medio: print → se aplica al imprimir (Ctrl+P)
 */

@media print {
    body {
        background-color: white;
        color: black;
    }

    .controles, .formulario, footer {
        display: none !important;
    }

    section {
        box-shadow: none;
        border: 1px solid #ccc;
        page-break-inside: avoid;
    }

    header {
        background-color: white;
        color: black;
        position: static;
    }

    .tabla-ranking th {
        background-color: #ddd;
        color: black;
    }
}


/* 
   15. REDUCED MOTION Accesibilidad 
   
   prefers-reduced-motion: reduce
   Se activa cuando el usuario tiene configurado en su SO
   que prefiere menos animaciones (epilepsia, migrañas, etc.)
 */

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .posicion.seleccionada {
        animation: none;
        box-shadow: 0 0 14px rgba(52, 199, 89, 0.35);
    }
}


/* ============================================================
   16. CLASE 12: Estilos para carga asincrona (UD6 §5)
   ============================================================
   Feedback visual para operaciones AJAX:
   - Boton deshabilitado mientras se envia
   - Texto "Cargando..." en tabla de ranking
   ============================================================ */

#btn-refrescar-ranking {
    font-size: 0.9em;
    padding: 8px 20px;
    cursor: pointer;
}

button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}


/* ===================== TUTORIAL ===================== */

body.modo-tutorial .subtitulo { display: none; }

body.modo-tutorial #juego { display: none !important; }
body.modo-tutorial #tutorial-wrap { display: flex !important; }
body.modo-game #tutorial-wrap { display: none !important; }

body.modo-tutorial main {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: start;
    padding-top: 0;
    margin-top: 0;
    flex-grow: 1;
}

.tutorial-wrap {
    display: flex;
    justify-content: center;
    width: 100%;
    flex: 0 0 auto;
    padding: 0;
}

.tutorial-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    width: 100%;
    max-width: 500px;
    margin: 0 auto;
    gap: 1.5rem;
    padding: 1rem 2rem;
}

.tutorial-title {
    font-size: 1.8rem;
    font-weight: 600;
    color: rgba(0, 0, 0, 0.55);
    letter-spacing: 0.03em;
    margin: 0 0 0.5rem 0;
}

.tutorial-board {
    display: flex;
    gap: 2rem;
    align-items: center;
    justify-content: center;
    padding: 2.5rem 3.5rem;
    background: rgba(255, 255, 255, 0.45);
    border-radius: 24px;
    backdrop-filter: blur(8px);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.04);
}

.tutorial-pos {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.5s ease;
    position: relative;
}

.tutorial-pos.tutorial-ficha {
    background: radial-gradient(circle at 38% 32%,
        rgba(255,255,255,0.95) 0%,
        rgba(230,235,240,0.9) 40%,
        rgba(200,210,220,0.85) 70%,
        rgba(170,185,200,0.8) 100%);
    box-shadow:
        inset 0 2px 4px rgba(255,255,255,0.9),
        inset 0 -2px 4px rgba(0,0,0,0.08),
        0 3px 8px rgba(0,0,0,0.1),
        0 1px 3px rgba(0,0,0,0.06);
}

.tutorial-ficha-origen {
    animation: tutorial-pulse 2s ease-in-out infinite;
}

@keyframes tutorial-pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(100, 180, 255, 0.5), inset 0 2px 4px rgba(255,255,255,0.9), 0 3px 8px rgba(0,0,0,0.1); }
    50% { box-shadow: 0 0 0 16px rgba(100, 180, 255, 0), inset 0 2px 4px rgba(255,255,255,0.9), 0 3px 8px rgba(0,0,0,0.1); }
}

.tutorial-ficha-intermedia {
    opacity: 0.5;
}

.tutorial-hueco-destino {
    background: transparent !important;
    box-shadow: none !important;
    border: 2.5px dashed rgba(100, 180, 255, 0.45);
    animation: tutorial-glow 2s ease-in-out infinite;
}

@keyframes tutorial-glow {
    0%, 100% { border-color: rgba(100, 180, 255, 0.3); }
    50% { border-color: rgba(100, 180, 255, 0.7); }
}

.tutorial-ficha-mover {
    transition: transform 0.8s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.tutorial-ficha-desaparecer {
    transition: opacity 0.6s ease, transform 0.6s ease;
    opacity: 0 !important;
    transform: scale(0.3) !important;
}

.tutorial-steps-indicator {
    display: flex;
    gap: 0.6rem;
    justify-content: center;
    margin: 0.5rem 0;
}

.tutorial-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.12);
    transition: all 0.4s ease;
}

.tutorial-dot.active {
    background: rgba(0, 0, 0, 0.4);
    transform: scale(1.3);
}

.tutorial-text {
    font-size: 1.3rem;
    font-weight: 500;
    color: rgba(0, 0, 0, 0.5);
    text-align: center;
    line-height: 1.5;
    transition: opacity 0.4s ease;
    min-height: 2.5rem;
}

.tutorial-text.fade-out {
    opacity: 0;
}

.tutorial-btn-play {
    background: linear-gradient(135deg, #a8d8ea, #7ec8c8);
    color: white;
    border: none;
    padding: 0.9rem 2.5rem;
    border-radius: 16px;
    font-size: 1.15rem;
    font-weight: 600;
    cursor: pointer;
    box-shadow: 0 4px 20px rgba(126, 200, 200, 0.3);
    transition: all 0.3s ease;
    letter-spacing: 0.02em;
}

.tutorial-btn-play:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(126, 200, 200, 0.4);
}

.tutorial-btn-skip {
    background: none;
    border: none;
    color: rgba(0, 0, 0, 0.3);
    font-size: 0.9rem;
    cursor: pointer;
    padding: 0.5rem 1rem;
    transition: color 0.3s ease;
}

.tutorial-btn-skip:hover {
    color: rgba(0, 0, 0, 0.5);
}

.tutorial-btn-repeat {
    background: none;
    border: none;
    color: rgba(0, 0, 0, 0.25);
    font-size: 0.8rem;
    cursor: pointer;
    padding: 0.4rem 0.8rem;
    transition: color 0.3s ease;
}

.tutorial-btn-repeat:hover {
    color: rgba(0, 0, 0, 0.45);
}

@media (max-width: 480px) {
    .tutorial-content { padding: 1rem; gap: 1.2rem; }
    .tutorial-board { gap: 1.2rem; padding: 1.5rem 2rem; }
    .tutorial-pos { width: 70px; height: 70px; }
    .tutorial-title { font-size: 1.4rem; }
    .tutorial-text { font-size: 1.1rem; }
}