/* =========================================
   DS Métrica - Styles
   Academic minimalist design
   ========================================= */

/* CSS Variables */
:root {
    /* Colors */
    --color-primary: #1a2b3c;
    --color-primary-light: #2c4158;
    --color-slate: #64748b;
    --color-slate-light: #94a3b8;
    --color-white: #ffffff;
    --color-gray-50: #f8fafc;
    --color-gray-100: #f1f5f9;
    --color-gray-200: #e2e8f0;
    --color-gray-800: #1e293b;
    
    /* Typography */
    --font-family: 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --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: 3rem;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* Container */
    --container-max: 1200px;
    --container-padding: 1.5rem;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 300ms ease;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-gray-800);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Container */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    color: var(--color-primary);
}

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

/* =========================================
   Header & Navigation
   ========================================= */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--color-white);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    z-index: 1000;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav__logo {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: -0.02em;
}

.nav__menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
}

.nav__link {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-slate);
    padding: var(--spacing-xs) 0;
    position: relative;
}

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

.nav__link:hover {
    color: var(--color-primary);
}

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

/* Mobile Navigation Toggle */
.nav__toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 24px;
    height: 18px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
}

.nav__toggle-line {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--color-primary);
    transition: transform var(--transition-base), opacity var(--transition-base);
}

/* =========================================
   Hero Section
   ========================================= */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: 
        linear-gradient(135deg, rgba(26, 43, 60, 0.9) 0%, rgba(44, 65, 88, 0.9) 100%),
        radial-gradient(circle at 20% 30%, rgba(26, 43, 60, 0.8) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(44, 65, 88, 0.6) 0%, transparent 50%),
        linear-gradient(45deg, #0f1419 0%, #1a2b3c 25%, #2c4158 50%, #1a2b3c 75%, #0f1419 100%);
    background-size: 100% 100%, 800px 600px, 600px 800px, 100% 100%;
    background-position: center, top left, bottom right, center;
    background-attachment: fixed;
    padding-top: 70px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 800"><defs><linearGradient id="grad1" x1="0%" y1="0%" x2="100%" y2="100%"><stop offset="0%" style="stop-color:%23ffffff;stop-opacity:0.05" /><stop offset="50%" style="stop-color:%23ffffff;stop-opacity:0.02" /><stop offset="100%" style="stop-color:%23ffffff;stop-opacity:0" /></linearGradient></defs><path fill="url(%23grad1)" d="M0,400 Q300,200 600,350 Q900,500 1200,300 L1200,0 L0,0 Z"/><path fill="url(%23grad1)" d="M0,800 Q300,600 600,750 Q900,900 1200,700 L1200,500 L0,500 Z"/></svg>') no-repeat;
    background-size: cover;
    opacity: 0.7;
    z-index: 1;
    animation: float 20s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    33% { transform: translateY(-10px) rotate(1deg); }
    66% { transform: translateY(5px) rotate(-1deg); }
}

.hero::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: 
        radial-gradient(circle, rgba(255, 255, 255, 0.1) 1px, transparent 1px);
    background-size: 50px 50px;
    opacity: 0.3;
    animation: drift 30s linear infinite;
    z-index: 1;
}

@keyframes drift {
    0% { transform: translate(0, 0) rotate(0deg); }
    100% { transform: translate(-50px, -50px) rotate(360deg); }
}

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

.hero__content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-3xl) 0;
}

.hero__title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--color-white);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.hero__subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-gray-200);
    margin-bottom: var(--spacing-xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-base);
    font-weight: 500;
    border-radius: 4px;
    transition: all var(--transition-base);
    cursor: pointer;
    border: none;
}

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

.btn--primary:hover {
    background-color: transparent;
    color: var(--color-white);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 255, 255, 0.3);
}

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

.btn--secondary:hover {
    background-color: var(--color-primary-light);
    border-color: var(--color-primary-light);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(26, 43, 60, 0.3);
}

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

.btn--outline:hover {
    background-color: var(--color-primary);
    color: var(--color-white);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(26, 43, 60, 0.3);
}

/* =========================================
   Section Styles
   ========================================= */
.section__title {
    font-size: var(--font-size-2xl);
    text-align: center;
    margin-bottom: var(--spacing-xl);
    position: relative;
}

.section__title::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background-color: var(--color-primary);
    margin: var(--spacing-sm) auto 0;
}

/* =========================================
   About Section
   ========================================= */
.about {
    padding: var(--spacing-3xl) 0;
    background-color: var(--color-white);
}

.about__content {
    max-width: 800px;
    margin: 0 auto;
}

.about__text {
    font-size: var(--font-size-lg);
    color: var(--color-slate);
    text-align: center;
    line-height: 1.8;
}

/* =========================================
   Specializations Section
   ========================================= */
.specializations {
    padding: var(--spacing-3xl) 0;
    background-color: var(--color-gray-50);
}

.specializations__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.specialization-card {
    background-color: var(--color-white);
    padding: var(--spacing-xl);
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.specialization-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.specialization-card__icon {
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.specialization-card__title {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-sm);
}

.specialization-card__description {
    color: var(--color-slate);
    line-height: 1.7;
}

/* =========================================
   Contact Section
   ========================================= */
.contact {
    padding: var(--spacing-3xl) 0;
    background-color: var(--color-white);
}

.contact__content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.contact__text {
    font-size: var(--font-size-lg);
    color: var(--color-slate);
    margin-bottom: var(--spacing-lg);
}

.contact__email {
    display: inline-block;
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--color-primary);
    padding: var(--spacing-sm) var(--spacing-lg);
    border: 2px solid var(--color-primary);
    border-radius: 4px;
    transition: all var(--transition-base);
}

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

/* =========================================
   Footer
   ========================================= */
.footer {
    background-color: var(--color-primary);
    color: var(--color-white);
    padding-top: var(--spacing-2xl);
}

.footer__content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-xl);
    padding-bottom: var(--spacing-xl);
}

.footer__logo {
    font-size: var(--font-size-xl);
    font-weight: 700;
}

.footer__tagline {
    font-size: var(--font-size-sm);
    color: var(--color-slate-light);
    margin-top: var(--spacing-xs);
}

.footer__heading {
    font-size: var(--font-size-base);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-white);
}

.footer__list {
    list-style: none;
}

.footer__list li {
    margin-bottom: var(--spacing-xs);
}

.footer__link {
    color: var(--color-slate-light);
    font-size: var(--font-size-sm);
}

.footer__link:hover {
    color: var(--color-white);
}

.footer__bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: var(--spacing-md) 0;
}

.footer__copyright {
    font-size: var(--font-size-sm);
    color: var(--color-slate-light);
    text-align: center;
}

/* =========================================
   Cookies Banner
   ========================================= */
.cookies-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: var(--spacing-md) 0;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1001;
    transform: translateY(100%);
    transition: transform var(--transition-base);
}

.cookies-banner.show {
    transform: translateY(0);
}

.cookies-banner__content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-lg);
}

.cookies-banner__text {
    flex: 1;
    margin: 0;
    font-size: var(--font-size-sm);
    line-height: 1.5;
}

.cookies-banner__actions {
    display: flex;
    gap: var(--spacing-sm);
    flex-shrink: 0;
}

.cookies-banner__actions .btn {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: var(--font-size-sm);
    min-width: auto;
}

/* =========================================
   Responsive Design
   ========================================= */

/* Tablet */
@media (max-width: 768px) {
    :root {
        --font-size-3xl: 1.75rem;
        --font-size-2xl: 1.375rem;
    }

    .nav__toggle {
        display: flex;
    }

    .nav__menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background-color: var(--color-white);
        flex-direction: column;
        align-items: center;
        padding: var(--spacing-lg);
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-base);
    }

    .nav__menu--active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav__toggle--active .nav__toggle-line:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .nav__toggle--active .nav__toggle-line:nth-child(2) {
        opacity: 0;
    }

    .nav__toggle--active .nav__toggle-line:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

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

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

    .hero__subtitle {
        font-size: var(--font-size-base);
    }

    .specializations__grid {
        grid-template-columns: 1fr;
    }

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

/* Mobile */
@media (max-width: 480px) {
    :root {
        --container-padding: 1rem;
        --spacing-3xl: 4rem;
    }

    .hero {
        min-height: auto;
        padding-top: 90px;
        padding-bottom: var(--spacing-xl);
    }

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

    .btn {
        width: 100%;
        text-align: center;
    }

    .specialization-card {
        padding: var(--spacing-lg);
    }
    
    .cookies-banner__content {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-md);
    }
    
    .cookies-banner__actions {
        justify-content: center;
    }
}