/* ===== VARIABLES CSS - RiverRed Theme ===== */
:root {
    /* Colores principales - Basados en el logo */
    --color-primary: #1a2744;
    --color-primary-dark: #0f1829;
    --color-primary-light: #2a3a5c;
    --color-red: #c41e3a;
    --color-red-dark: #9a1830;
    --color-red-light: #e63950;

    /* Colores de fondo */
    --color-bg-primary: #0f1829;
    --color-bg-secondary: #1a2744;
    --color-bg-tertiary: #243352;
    --color-bg-card: #1e2d4d;

    /* Colores de texto */
    --color-text-primary: #ffffff;
    --color-text-secondary: #b8c5d9;
    --color-text-muted: #8899b3;

    /* Gradientes */
    --gradient-primary: linear-gradient(135deg, #1a2744 0%, #2a3a5c 100%);
    --gradient-red: linear-gradient(135deg, #c41e3a 0%, #e63950 100%);
    --gradient-hero: linear-gradient(180deg, rgba(15, 24, 41, 0.85) 0%, rgba(26, 39, 68, 0.9) 100%);

    /* Sombras */
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 30px rgba(196, 30, 58, 0.3);

    /* Tipografía */
    --font-family: 'Montserrat', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3.5rem;

    /* Espaciado */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 5rem;

    /* Bordes */
    --border-radius-sm: 0.5rem;
    --border-radius-md: 1rem;
    --border-radius-lg: 1.5rem;
    --border-radius-full: 9999px;

    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --z-header: 100;
    --z-modal: 200;
    --container-max: 1280px;
    --container-padding: 1.5rem;
    --header-height: 5rem;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--header-height);
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.7;
    color: var(--color-text-primary);
    background: var(--color-bg-primary);
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

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

/* ===== UTILIDADES ===== */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.section {
    padding: var(--spacing-2xl) 0;
}

.section__header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section__subtitle {
    display: inline-block;
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-red);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin-bottom: var(--spacing-xs);
}

.section__title {
    font-size: var(--font-size-4xl);
    font-weight: 800;
    color: var(--color-text-primary);
}

.section__description {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: var(--spacing-sm) auto 0;
}

.section__cta {
    text-align: center;
    margin-top: var(--spacing-xl);
}

/* ===== BOTONES ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    font-weight: 700;
    border-radius: var(--border-radius-full);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.btn--primary {
    background: var(--gradient-red);
    color: white;
    box-shadow: var(--shadow-glow);
}

.btn--primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 0 40px rgba(196, 30, 58, 0.5);
}

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

.btn--secondary:hover {
    background: var(--color-red);
    color: white;
}

.btn--outline {
    background: transparent;
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.4);
}

.btn--outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: white;
}

/* ===== HEADER ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background: rgba(15, 24, 41, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    z-index: var(--z-header);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.nav__logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo-img {
    height: 50px;
    width: auto;
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
}

.logo-river,
.logo-red,
.hero-river,
.hero-red {
    font-weight: 900;
    font-size: var(--font-size-xl);
}

.logo-river,
.hero-river {
    color: white;
}

.logo-red,
.hero-red {
    color: var(--color-red);
}

.logo-tagline {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.nav__list {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.nav__link {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
    position: relative;
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-red);
    transition: width var(--transition-normal);
}

.nav__link:hover,
.nav__link.active {
    color: white;
}

.nav__link:hover::after,
.nav__link.active::after {
    width: 100%;
}

.nav__toggle,
.nav__close {
    display: none;
}

/* ===== HERO ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: var(--color-bg-primary);
    padding-top: var(--header-height);
}

.hero__overlay {
    position: absolute;
    inset: 0;
    background: var(--gradient-hero);
}

.hero__container {
    position: relative;
    z-index: 2;
}

.hero__content {
    max-width: 700px;
}

.hero__badge {
    display: inline-block;
    background: rgba(196, 30, 58, 0.2);
    border: 1px solid var(--color-red);
    padding: 0.5rem 1.5rem;
    border-radius: var(--border-radius-full);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-red-light);
    margin-bottom: var(--spacing-md);
}

.hero__title {
    font-size: 5rem;
    font-weight: 900;
    line-height: 1;
    margin-bottom: var(--spacing-sm);
}

.hero__subtitle {
    font-size: var(--font-size-2xl);
    font-weight: 300;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    text-transform: uppercase;
    letter-spacing: 0.2em;
}

.hero__description {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.8;
}

.hero__buttons {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

/* ===== STATS ===== */
.stats-section {
    background: var(--color-red);
    padding: var(--spacing-lg) 0;
}

.stats__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
    text-align: center;
}

.stat-number {
    display: block;
    font-size: var(--font-size-3xl);
    font-weight: 900;
    color: white;
}

.stat-label {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.8);
}

/* ===== ABOUT ===== */
.about-preview {
    background: var(--color-bg-secondary);
}

.about-preview__content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.about-preview__text p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

.about-features {
    margin: var(--spacing-md) 0 var(--spacing-lg);
}

.about-features li {
    color: var(--color-text-secondary);
    padding: var(--spacing-xs) 0;
}

.about-placeholder {
    width: 100%;
    aspect-ratio: 4/3;
    background: var(--gradient-primary);
    border-radius: var(--border-radius-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-size: 5rem;
    color: white;
    border: 2px solid var(--color-bg-tertiary);
}

.about-placeholder p {
    font-size: var(--font-size-lg);
    margin-top: var(--spacing-sm);
}

/* ===== DOGS ===== */
.dogs-preview {
    background: var(--color-bg-primary);
}

.dogs__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.dog-card {
    background: var(--color-bg-card);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    transition: all var(--transition-normal);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.dog-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-red);
}

.dog-card__image {
    position: relative;
    height: 250px;
}

.dog-placeholder {
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
}

.dog-card__badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: var(--color-primary);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: var(--border-radius-full);
    font-size: var(--font-size-xs);
    font-weight: 700;
}

.dog-card__badge.female {
    background: var(--color-red);
}

.dog-card__content {
    padding: var(--spacing-md);
}

.dog-card__name {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.dog-card__info {
    font-size: var(--font-size-sm);
    color: var(--color-red);
    margin-bottom: var(--spacing-xs);
}

.dog-card__desc {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

/* ===== LITTERS ===== */
.litters-preview {
    background: var(--color-bg-secondary);
}

.litter-featured {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    background: var(--color-bg-card);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.litter-featured__image {
    min-height: 400px;
}

.litter-placeholder {
    width: 100%;
    height: 100%;
    background: var(--gradient-red);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 6rem;
}

.litter-featured__content {
    padding: var(--spacing-xl);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.litter-badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-full);
    font-size: var(--font-size-xs);
    font-weight: 700;
    text-transform: uppercase;
    margin-bottom: var(--spacing-md);
    width: fit-content;
}

.litter-badge.available {
    background: rgba(40, 167, 69, 0.2);
    color: #28a745;
    border: 1px solid #28a745;
}

.litter-featured__title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.litter-featured__date {
    font-size: var(--font-size-sm);
    color: var(--color-red);
    margin-bottom: var(--spacing-md);
}

.litter-featured__desc {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

.litter-features {
    margin-bottom: var(--spacing-lg);
}

.litter-features li {
    color: var(--color-text-secondary);
    padding: var(--spacing-xs) 0;
    font-size: var(--font-size-sm);
}

/* ===== FEATURES ===== */
.why-us {
    background: var(--color-bg-primary);
}

.features__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
}

.feature-card {
    background: var(--color-bg-card);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all var(--transition-normal);
}

.feature-card:hover {
    border-color: var(--color-red);
    transform: translateY(-5px);
}

.feature-card__icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.feature-card__title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.feature-card p {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

/* ===== SOCIAL ===== */
.social-section {
    background: var(--color-bg-secondary);
}

.social__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
}

.social-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    background: var(--color-bg-card);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all var(--transition-normal);
}

.social-card:hover {
    transform: translateY(-5px);
    border-color: var(--color-red);
}

.social-card__icon {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--border-radius-md);
    font-size: 1.5rem;
}

.social-card--instagram .social-card__icon {
    background: linear-gradient(45deg, #f09433, #dc2743, #bc1888);
}

.social-card--facebook .social-card__icon {
    background: #1877f2;
    color: white;
}

.social-card--youtube .social-card__icon {
    background: #ff0000;
}

.social-card--tiktok .social-card__icon {
    background: #000;
}

.social-card__info h3 {
    font-size: var(--font-size-base);
    font-weight: 700;
}

.social-card__info p {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

/* ===== FOOTER ===== */
.footer {
    background: var(--color-bg-primary);
    padding-top: var(--spacing-2xl);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer__content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--spacing-xl);
    padding-bottom: var(--spacing-xl);
}

.footer__logo {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-xs);
}

.footer__tagline {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-sm);
}

.footer__description {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    max-width: 300px;
}

.footer__social {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.social__link {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-card);
    border-radius: 50%;
    transition: all var(--transition-normal);
}

.social__link:hover {
    background: var(--color-red);
    transform: translateY(-3px);
}

.footer__links h4 {
    font-size: var(--font-size-base);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.footer__links ul {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer__links a,
.footer__links li {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

.footer__links a:hover {
    color: var(--color-red);
}

.footer__bottom {
    padding: var(--spacing-md) 0;
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

/* ===== PAGE HEADER ===== */
.page-header {
    position: relative;
    min-height: 40vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    padding-top: var(--header-height);
    text-align: center;
}

.page-header__overlay {
    position: absolute;
    inset: 0;
    background: rgba(15, 24, 41, 0.7);
}

.page-header__content {
    position: relative;
    z-index: 2;
}

.page-header__icon {
    font-size: 4rem;
    display: block;
    margin-bottom: var(--spacing-sm);
}

.page-header__title {
    font-size: var(--font-size-5xl);
    font-weight: 800;
}

.page-header__description {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    margin-top: var(--spacing-sm);
}

/* ===== RESPONSIVE ===== */
@media screen and (max-width: 1024px) {

    .stats__grid,
    .features__grid,
    .social__grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .dogs__grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .litter-featured {
        grid-template-columns: 1fr;
    }
}

@media screen and (max-width: 768px) {
    .nav__menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        height: 100vh;
        background: var(--color-bg-secondary);
        padding: 5rem 2rem;
        transition: right var(--transition-normal);
        z-index: var(--z-modal);
    }

    .nav__menu.show {
        right: 0;
    }

    .nav__list {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-lg);
    }

    .nav__link {
        font-size: var(--font-size-lg);
    }

    .nav__close {
        display: flex;
        position: absolute;
        top: 1rem;
        right: 1rem;
        width: 40px;
        height: 40px;
        align-items: center;
        justify-content: center;
        background: var(--color-bg-card);
        border-radius: 50%;
        font-size: 1.5rem;
        cursor: pointer;
    }

    .nav__toggle {
        display: flex;
        flex-direction: column;
        gap: 5px;
        cursor: pointer;
    }

    .nav__toggle span {
        width: 25px;
        height: 3px;
        background: white;
        border-radius: 2px;
    }

    .hero__title {
        font-size: 3rem;
    }

    .hero__buttons {
        flex-direction: column;
    }

    .about-preview__content {
        grid-template-columns: 1fr;
    }

    .dogs__grid,
    .features__grid,
    .social__grid {
        grid-template-columns: 1fr;
    }

    .footer__content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer__social {
        justify-content: center;
    }
}

@media screen and (max-width: 480px) {
    .stats__grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-sm);
    }

    .stat-number {
        font-size: var(--font-size-2xl);
    }

    .hero__title {
        font-size: 2.5rem;
    }

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

/* ===== CONTACT SECTION ===== */
.contact {
    background: var(--color-bg-primary);
}

.contact__content {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: var(--spacing-xl);
    align-items: start;
}

.contact__info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.contact__card {
    background: var(--color-bg-card);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all var(--transition-normal);
}

.contact__card:hover {
    border-color: var(--color-red);
    transform: translateX(5px);
}

.contact__icon {
    font-size: 1.5rem;
    display: block;
    margin-bottom: var(--spacing-xs);
}

.contact__card h3 {
    font-size: var(--font-size-lg);
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text-primary);
}

.contact__card p {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* Contact Form */
.contact__form {
    background: var(--color-bg-card);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.contact__form h3 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    color: var(--color-text-primary);
}

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

.form__input {
    width: 100%;
    padding: 1rem 1.25rem;
    background: var(--color-bg-secondary);
    border: 2px solid transparent;
    border-radius: var(--border-radius-md);
    color: var(--color-text-primary);
    font-size: var(--font-size-base);
    transition: all var(--transition-normal);
}

.form__input::placeholder {
    color: var(--color-text-muted);
}

.form__input:focus {
    border-color: var(--color-red);
    background: var(--color-bg-tertiary);
    outline: none;
}

.form__input:hover {
    border-color: rgba(196, 30, 58, 0.5);
}

select.form__input {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%238899b3' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 1rem;
    padding-right: 3rem;
}

select.form__input option {
    background: var(--color-bg-secondary);
    color: var(--color-text-primary);
}

.form__textarea {
    min-height: 150px;
    resize: vertical;
}

.btn--full {
    width: 100%;
    justify-content: center;
}

/* Dog Card Tags */
.dog-card__tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-sm);
}

.dog-card__tags span {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: rgba(196, 30, 58, 0.15);
    color: var(--color-red-light);
    border-radius: var(--border-radius-full);
    font-size: var(--font-size-xs);
    font-weight: 600;
}

/* Responsive Contact */
@media screen and (max-width: 768px) {
    .contact__content {
        grid-template-columns: 1fr;
    }

    .contact__info {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-sm);
    }
}

@media screen and (max-width: 480px) {
    .contact__info {
        grid-template-columns: 1fr;
    }

    .contact__form {
        padding: var(--spacing-md);
    }
}