/**
 * INSTANTES COTIDIANOS - Sistema de Estilos Fullscreen
 * Diseño inmersivo de pantalla completa con navegación vertical
 * Cada sección = 1 imagen + 1 frase para experiencia contemplativa
 */

/* ========================================
   VARIABLES CSS - Sistema Midnight Blue
   ======================================== */
:root {
    /* Paleta de color principal */
    --color-midnight-blue: #191970;
    --color-bg-primary: #0a0913;
    --color-bg-overlay: rgba(10, 9, 19, 0.75);
    --color-bg-overlay-heavy: rgba(10, 9, 19, 0.85);

    /* Textos */
    --color-text-primary: #EAEAFA;
    --color-text-secondary: #9F9FEA;
    --color-text-muted: #6b6b8f;

    /* Acentos */
    --color-accent-primary: #191970;
    --color-accent-hover: #2929a3;

    /* Tipografía */
    --font-serif: 'Georgia', 'Palatino Linotype', 'Book Antiqua', serif;
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;

    /* Tamaños tipográficos */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 2rem;
    --text-4xl: 2.5rem;
    --text-5xl: 3rem;

    /* Espaciado */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;

    /* Transiciones */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);

    /* Sombras */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.5);
    --shadow-text: 0 2px 8px rgba(0, 0, 0, 0.8);

    /* Border radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-full: 50%;
}

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

html {
    font-size: 16px;
    /* Ocultar cursor del sistema */
    cursor: none;
    /* Scroll suave nativo */
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    /* Anti-aliasing */
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover, a:focus {
    color: var(--color-accent-hover);
    outline: none;
}

/* ========================================
   CURSOR PERSONALIZADO
   ======================================== */
.cursor {
    position: fixed;
    top: 0;
    left: 0;
    pointer-events: none;
    z-index: 9999;
}

.cursor__pointer {
    position: fixed;
    width: 8px;
    height: 8px;
    background-color: var(--color-text-primary);
    border-radius: var(--radius-full);
    transform: translate(-50%, -50%);
    transition: transform var(--transition-fast), background-color var(--transition-fast);
}

.cursor__follower {
    position: fixed;
    width: 32px;
    height: 32px;
    border: 2px solid var(--color-accent-primary);
    border-radius: var(--radius-full);
    transform: translate(-50%, -50%);
    opacity: 0.6;
    transition: transform var(--transition-base), width var(--transition-base), height var(--transition-base), border-color var(--transition-base);
}

.cursor--hover .cursor__follower {
    width: 60px;
    height: 60px;
    border-color: var(--color-text-secondary);
    opacity: 0.8;
}

.cursor--hover .cursor__pointer {
    transform: translate(-50%, -50%) scale(0.5);
}

/* Ocultar en dispositivos táctiles */
@media (hover: none) and (pointer: coarse) {
    .cursor {
        display: none;
    }
    html {
        cursor: auto;
    }
}

/* ========================================
   SPLASH SCREEN - Pantalla de Carga Inicial
   ======================================== */
.splash-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: var(--color-bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10001;
    opacity: 1;
    transition: opacity 0.8s ease, visibility 0.8s ease;
}

.splash-screen.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

/* Corazón SVG */
.splash-heart {
    width: 60px;
    height: 60px;
    filter: drop-shadow(0 0 20px rgba(159, 159, 234, 0.5));
}

/* Animación de dibujo del corazón */
.splash-heart__path {
    stroke-dasharray: 300;
    stroke-dashoffset: 300;
    animation: drawHeart 2s ease-in-out infinite;
}

@keyframes drawHeart {
    0% {
        stroke-dashoffset: 300;
        opacity: 0.3;
    }
    50% {
        stroke-dashoffset: 0;
        opacity: 1;
    }
    100% {
        stroke-dashoffset: -300;
        opacity: 0.3;
    }
}

/* Animación de pulso del corazón (opcional, para después del dibujo) */
.splash-heart.pulse {
    animation: heartPulse 1.2s ease-in-out infinite;
}

@keyframes heartPulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
    }
}

/* ========================================
   LOADING STATE
   ======================================== */
.loading {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    z-index: 10000;
    opacity: 1;
    transition: opacity var(--transition-slow);
}

.loading.hidden {
    opacity: 0;
    pointer-events: none;
}

.loading__spinner {
    width: 50px;
    height: 50px;
    border: 3px solid rgba(25, 25, 112, 0.2);
    border-top-color: var(--color-accent-primary);
    border-radius: var(--radius-full);
    margin: 0 auto var(--space-md);
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading__text {
    color: var(--color-text-secondary);
    font-size: var(--text-lg);
    font-style: italic;
}

/* ========================================
   CONTENEDOR FULLSCREEN
   ======================================== */
.fullscreen-container {
    width: 100%;
    height: 100vh;
    overflow-y: scroll;
    overflow-x: hidden;
    /* Scroll snap para navegación fluida */
    scroll-snap-type: y mandatory;
    scroll-behavior: smooth;
    /* Ocultar scrollbar pero mantener funcionalidad */
    scrollbar-width: none; /* Firefox */
    -ms-overflow-style: none; /* IE/Edge */
}

.fullscreen-container::-webkit-scrollbar {
    display: none; /* Chrome/Safari */
}

/* ========================================
   SECCIONES FULLSCREEN
   ======================================== */
.fullscreen-section {
    width: 100%;
    height: 100vh;
    position: relative;
    scroll-snap-align: start;
    scroll-snap-stop: always;
    overflow: hidden;
}

/* ========================================
   FONDOS ANIMADOS CON DEGRADADOS
   ======================================== */
.section__background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    overflow: hidden;
}

/* Degradados variados para cada sección */
.section__background--gradient-1 {
    background: linear-gradient(135deg, #0a0913 0%, #1f1a3a 40%, #12102a 70%, #0a0913 100%);
}

.section__background--gradient-2 {
    background: linear-gradient(225deg, #08070f 0%, #251f45 35%, #1a1535 65%, #0a0913 100%);
}

.section__background--gradient-3 {
    background: radial-gradient(ellipse at top, #1e1940 0%, #14112b 50%, #0a0913 100%);
}

.section__background--gradient-4 {
    background: linear-gradient(45deg, #0a0913 0%, #2a2350 45%, #15122d 75%, #0a0913 100%);
}

.section__background--gradient-5 {
    background: radial-gradient(ellipse at bottom, #221d48 0%, #181430 50%, #0a0913 100%);
}

/* Contenedor de figuras animadas */
.animated-shapes {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

/* Estilos base para las figuras SVG */
.shape {
    position: absolute;
    opacity: 0.3;
}

/* Animaciones de flotación */
@keyframes float {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
        opacity: 0.7;
    }
    50% {
        transform: translateY(-30px) rotate(8deg);
        opacity: 0.9;
    }
}

@keyframes floatReverse {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
        opacity: 0.7;
    }
    50% {
        transform: translateY(30px) rotate(-8deg);
        opacity: 0.9;
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 0.6;
        transform: scale(1);
    }
    50% {
        opacity: 1;
        transform: scale(1.2);
    }
}

@keyframes twinkle {
    0%, 100% {
        opacity: 0.4;
        transform: scale(0.9);
    }
    50% {
        opacity: 1;
        transform: scale(1.1);
    }
}

@keyframes draw {
    0% {
        stroke-dashoffset: 1000;
        opacity: 0.5;
    }
    50% {
        opacity: 0.9;
    }
    100% {
        stroke-dashoffset: 0;
        opacity: 0.85;
    }
}

/* Corazones */
.shape--heart-1 {
    width: 40px;
    height: 40px;
    animation: float 5s ease-in-out infinite;
}

.shape--heart-2 {
    width: 30px;
    height: 30px;
    animation: floatReverse 6s ease-in-out infinite;
}

.shape--heart-3 {
    width: 25px;
    height: 25px;
    animation: pulse 4s ease-in-out infinite;
}

/* Estrellas */
.shape--star-1 {
    width: 22px;
    height: 22px;
    animation: twinkle 3s ease-in-out infinite;
}

.shape--star-2 {
    width: 18px;
    height: 18px;
    animation: twinkle 2.5s ease-in-out infinite 0.8s;
}

.shape--star-3 {
    width: 20px;
    height: 20px;
    animation: twinkle 3.5s ease-in-out infinite 1.5s;
}

/* Sparkles - Cruz brillante */
.shape--sparkle-1,
.shape--sparkle-2,
.shape--sparkle-3 {
    position: absolute;
    background: rgba(159, 159, 234, 0.7);
    border-radius: 50%;
}

.shape--sparkle-1 {
    width: 3px;
    height: 12px;
    animation: twinkle 2s ease-in-out infinite;
}

.shape--sparkle-1::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(90deg);
    width: 3px;
    height: 12px;
    background: rgba(159, 159, 234, 0.7);
    border-radius: 50%;
}

.shape--sparkle-2 {
    width: 2px;
    height: 10px;
    animation: twinkle 3s ease-in-out infinite 0.5s;
}

.shape--sparkle-2::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(90deg);
    width: 2px;
    height: 10px;
    background: rgba(159, 159, 234, 0.7);
    border-radius: 50%;
}

.shape--sparkle-3 {
    width: 3px;
    height: 14px;
    animation: twinkle 2.5s ease-in-out infinite 1.5s;
}

.shape--sparkle-3::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(90deg);
    width: 3px;
    height: 14px;
    background: rgba(159, 159, 234, 0.7);
    border-radius: 50%;
}

/* Líneas curvas */
.shape--line-1 {
    width: 200px;
    height: 100px;
}

.shape--line-2 {
    width: 180px;
    height: 90px;
}

.shape--line path {
    stroke-dasharray: 1000;
    stroke-dashoffset: 1000;
    animation: draw 12s ease-in-out infinite;
}

/* ========================================
   CONTENIDO DE TEXTO
   ======================================== */
.section__content {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: var(--space-3xl) var(--space-xl);
    z-index: 3;
    text-align: center;
}

.section__quote {
    max-width: 900px;
    margin-bottom: var(--space-2xl);
    /* Animación de entrada */
    opacity: 0;
    transform: translateY(30px);
    animation: textReveal 1s cubic-bezier(0.4, 0, 0.2, 1) 0.3s forwards;
}

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

.section__quote-text {
    font-family: var(--font-serif);
    font-size: var(--text-3xl);
    line-height: 1.8;
    color: var(--color-text-primary);
    font-style: italic;
    margin-bottom: var(--space-xl);
    text-shadow: var(--shadow-text);
    position: relative;
    font-weight: 300;
    letter-spacing: 0.02em;
    white-space: pre-line;
}

.section__quote-text del {
    text-decoration: line-through;
    opacity: 0.7;
    color: var(--color-text-secondary);
}

/* Comillas decorativas */
.section__quote-text::before {
    content: '\201C';
    font-size: var(--text-5xl);
    color: #E8A8C8;
    position: absolute;
    top: -20px;
    left: -40px;
    opacity: 0.75;
}

.section__quote-author {
    font-family: var(--font-sans);
    font-size: var(--text-xl);
    color: var(--color-text-secondary);
    font-weight: 600;
    margin-top: var(--space-2xl);
    margin-bottom: var(--space-sm);
    text-shadow: var(--shadow-text);
    font-style: normal;
}

.section__quote-source {
    font-size: var(--text-lg);
    color: var(--color-text-muted);
    font-style: italic;
    text-shadow: var(--shadow-text);
}

/* Crédito del fotógrafo */
.section__photo-credit {
    position: absolute;
    bottom: var(--space-lg);
    right: var(--space-lg);
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    z-index: 4;
    opacity: 0.7;
    transition: opacity var(--transition-base);
    text-shadow: var(--shadow-text);
}

.section__photo-credit:hover {
    opacity: 1;
}

.section__photo-credit a {
    color: var(--color-text-secondary);
    text-decoration: underline;
    text-decoration-style: dotted;
}

/* ========================================
   CONTROLES DE NAVEGACIÓN
   ======================================== */
.nav-controls {
    position: fixed;
    right: var(--space-xl);
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    z-index: 1000;
    opacity: 0;
    animation: fadeIn 0.5s ease 1s forwards;
}

@keyframes fadeIn {
    to { opacity: 1; }
}

.nav-btn {
    width: 48px;
    height: 48px;
    background-color: rgba(25, 25, 112, 0.3);
    border: 2px solid var(--color-accent-primary);
    border-radius: var(--radius-full);
    color: var(--color-text-primary);
    cursor: none;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-base);
    backdrop-filter: blur(10px);
}

.nav-btn svg {
    width: 24px;
    height: 24px;
}

.nav-btn:hover {
    background-color: var(--color-accent-primary);
    transform: scale(1.1);
    box-shadow: var(--shadow-lg);
}

.nav-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
    pointer-events: none;
}

.nav-counter {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    font-family: var(--font-sans);
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    padding: var(--space-sm) var(--space-md);
    background-color: rgba(25, 25, 112, 0.3);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(10px);
    margin-top: var(--space-md);
}

.nav-counter__current {
    font-weight: 600;
    color: var(--color-text-primary);
}

/* ========================================
   HINT DE NAVEGACIÓN
   ======================================== */
.scroll-hint {
    position: fixed;
    bottom: var(--space-2xl);
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    z-index: 1000;
    opacity: 1;
    animation: pulse 2s ease-in-out infinite;
    transition: opacity var(--transition-slow);
}

.scroll-hint.hidden {
    opacity: 0;
    pointer-events: none;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
    50% {
        opacity: 0.5;
        transform: translateX(-50%) translateY(10px);
    }
}

.scroll-hint__text {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-sm);
    text-shadow: var(--shadow-text);
}

.scroll-hint__icon {
    width: 32px;
    height: 32px;
    color: var(--color-text-secondary);
    margin: 0 auto;
    filter: drop-shadow(var(--shadow-text));
}

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */

/* Tablets */
@media (max-width: 768px) {
    :root {
        --text-3xl: 1.75rem;
        --text-2xl: 1.5rem;
        --text-xl: 1.125rem;
    }

    .section__content {
        padding: var(--space-2xl) var(--space-lg);
    }

    .section__quote-text {
        font-size: var(--text-2xl);
    }

    .section__quote-text::before {
        left: -20px;
        top: -15px;
        font-size: var(--text-4xl);
    }

    .nav-controls {
        right: var(--space-lg);
    }

    .nav-btn {
        width: 40px;
        height: 40px;
    }

    .nav-btn svg {
        width: 20px;
        height: 20px;
    }
}

/* Móviles */
@media (max-width: 480px) {
    :root {
        --text-3xl: 1.5rem;
        --text-xl: 1rem;
    }

    .section__content {
        padding: var(--space-xl) var(--space-md);
    }

    .section__quote-text {
        font-size: var(--text-xl);
    }

    .section__quote-text::before {
        display: none; /* Ocultar comillas decorativas en móvil */
    }

    .section__photo-credit {
        bottom: var(--space-md);
        right: var(--space-md);
        font-size: var(--text-xs);
    }

    .nav-controls {
        flex-direction: row;
        top: auto;
        bottom: var(--space-lg);
        right: auto;
        left: 50%;
        transform: translateX(-50%);
    }

    .nav-counter {
        order: 2;
        margin: 0 var(--space-sm);
    }

    .nav-btn--prev {
        order: 1;
    }

    .nav-btn--next {
        order: 3;
    }
}

/* ========================================
   ACCESIBILIDAD
   ======================================== */

/* Preferencia de movimiento reducido */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }

    .cursor {
        display: none;
    }

    html {
        cursor: auto;
    }

    .fullscreen-container {
        scroll-snap-type: none;
    }
}

/* Focus visible para navegación por teclado */
:focus-visible {
    outline: 2px solid var(--color-accent-primary);
    outline-offset: 4px;
}

.nav-btn:focus-visible {
    outline-color: var(--color-text-primary);
}

/* ========================================
   UTILIDADES
   ======================================== */
.hidden {
    display: none !important;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}