/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Colors */
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
    --color-secondary: #64748b;
    --color-accent: #f59e0b;
    --color-text: #1e293b;
    --color-text-light: #64748b;
    --color-background: #ffffff;
    --color-background-light: #f8fafc;
    --color-border: #e2e8f0;
    --color-success: #10b981;
    --color-error: #ef4444;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 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: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* Border radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-normal: 250ms ease-in-out;
}

/* Font faces */
@font-face {
    font-family: 'Inter';
    src: url('../fonts/Inter-Regular.woff2') format('woff2');
    font-weight: 400;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'Inter';
    src: url('../fonts/Inter-Medium.woff2') format('woff2');
    font-weight: 500;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'Inter';
    src: url('../fonts/Inter-Bold.woff2') format('woff2');
    font-weight: 700;
    font-style: normal;
    font-display: swap;
}

/* Base styles */
html {
    scroll-behavior: smooth;
}

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

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

@media (min-width: 768px) {
    .container {
        padding: 0 var(--spacing-lg);
    }
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: var(--font-size-4xl);
}

h2 {
    font-size: var(--font-size-3xl);
}

h3 {
    font-size: var(--font-size-2xl);
}

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

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

a:hover {
    color: var(--color-primary-dark);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: top;
    justify-content: center;
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-base);
    font-weight: 500;
    line-height: 1.5;
    border: 2px solid transparent;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    min-height: 44px;
    min-width: 44px;
}

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

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

.btn--secondary {
    background-color: var(--color-background);
    color: var(--color-primary);
    border-color: var(--color-primary);
}

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

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

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

.btn--small {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: var(--font-size-sm);
    min-height: 36px;
}

/* Header */
.header {
    position: sticky;
    top: 0;
    background-color: var(--color-background);
    border-bottom: 1px solid var(--color-border);
    z-index: 100;
    backdrop-filter: blur(8px);
    background-color: rgba(255, 255, 255, 0.95);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) 0;
}

.nav__logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    transition: opacity var(--transition-fast);
}

.nav__logo:hover {
    opacity: 0.8;
}

.nav__logo-img {
    height: 40px;
    width: auto;
}

@media (max-width: 480px) {
    .nav__logo-img {
        height: 35px;
    }
}

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

@media (min-width: 768px) {
    .nav__menu {
        display: flex;
    }
}

.nav__link {
    color: var(--color-text);
    font-weight: 500;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.nav__link:hover,
.nav__link--active {
    color: var(--color-primary);
    background-color: rgba(37, 99, 235, 0.1);
}

.nav__toggle {
    display: flex;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
}

@media (min-width: 768px) {
    .nav__toggle {
        display: none;
    }
}

.nav__toggle span {
    width: 24px;
    height: 2px;
    background-color: var(--color-text);
    transition: var(--transition-fast);
}

/* Hero Section */
.hero {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, var(--color-background-light) 0%, var(--color-background) 100%);
}

.hero__logo {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.hero__logo-img {
    height: 80px;
    width: auto;
}

@media (max-width: 768px) {
    .hero__logo-img {
        height: 60px;
    }
}

.hero__content {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
    max-width: 1200px;
    margin: 0 auto;
    align-items: center;
}

@media (min-width: 768px) {
    .hero__content {
        grid-template-columns: 1fr 350px;
        text-align: left;
        gap: var(--spacing-2xl);
    }
}

.hero__photo-placeholder {
    width: 100%;
    height: 300px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: var(--font-size-lg);
    font-weight: 600;
    text-align: center;
    line-height: 1.3;
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

.hero__photo-placeholder::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0.05) 100%);
    pointer-events: none;
}

.hero__photo-text {
    max-width: 160px;
}

.hero__photo {
    display: flex;
    justify-content: center;
}

.hero__photo-container {
    position: relative;
    width: 250px;
    height: 300px;
    margin: 0 auto;
}

.hero__photo-img {
    width: 250px;
    height: 300px;
    border-radius: var(--radius-xl);
    object-fit: cover;
    object-position: center 5%;
    box-shadow: var(--shadow-lg);
    border: 4px solid white;
}

.hero__title {
    font-size: var(--font-size-5xl);
    margin-bottom: var(--spacing-lg);
    color: var(--color-text);
    line-height: 1.1;
}

.hero__title-line {
    display: block;
}

@media (max-width: 768px) {
    .hero__title {
        font-size: var(--font-size-4xl);
        text-align: center;
    }
}

.hero__lead {
    font-size: var(--font-size-xl);
    color: var(--color-text-light);
    margin-bottom: var(--spacing-2xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero__cta {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* Section titles */
.section__title {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
    color: var(--color-text);
}

/* Benefits Section */
.benefits {
    padding: var(--spacing-3xl) 0;
    background-color: var(--color-background);
}

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

@media (min-width: 768px) {
    .benefits__grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .benefits__grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.benefit {
    text-align: center;
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    background-color: var(--color-background);
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-normal);
}

.benefit:hover {
    transform: translateY(-4px);
}

.benefit__title {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
}

.benefit__text {
    color: var(--color-text-light);
    line-height: 1.6;
}

/* Trainings Section */
.trainings {
    padding: var(--spacing-3xl) 0;
    background-color: var(--color-background-light);
}

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

@media (min-width: 768px) {
    .trainings__grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .trainings__grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.training-card {
    background-color: var(--color-background);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
    display: flex;
    flex-direction: column;
}

.training-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.training-card__content {
    padding: var(--spacing-xl);
    flex: 1;
}

.training-card__title {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

.training-card__description {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.training-card__meta {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
}

.training-card__date,
.training-card__duration,
.training-card__format {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    background-color: var(--color-background-light);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
}

.training-card__tags {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.tag {
    font-size: var(--font-size-xs);
    color: var(--color-primary);
    background-color: rgba(37, 99, 235, 0.1);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
    font-weight: 500;
}

.training-card__cta {
    padding: 0 var(--spacing-xl) var(--spacing-xl);
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
}

.trainings__more {
    text-align: center;
}

/* Footer */
.footer {
    background-color: var(--color-text);
    color: white;
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

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

@media (min-width: 768px) {
    .footer__content {
        grid-template-columns: repeat(2, 1fr);
    }
}

.footer h3 {
    color: white;
    margin-bottom: var(--spacing-md);
}

.footer a {
    color: rgba(255, 255, 255, 0.8);
    transition: color var(--transition-fast);
}

.footer a:hover {
    color: white;
}

.footer__nav ul {
    list-style: none;
}

.footer__nav li {
    margin-bottom: var(--spacing-sm);
}

.footer__bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    padding-top: var(--spacing-lg);
    text-align: center;
    color: rgba(255, 255, 255, 0.6);
}

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

/* Focus styles */
.btn:focus,
.nav__link:focus,
a:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Mobile menu */
.nav__menu--open {
    display: flex;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--color-background);
    border-top: 1px solid var(--color-border);
    flex-direction: column;
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-lg);
}

@media (min-width: 768px) {
    .nav__menu--open {
        position: static;
        flex-direction: row;
        padding: 0;
        border-top: none;
        box-shadow: none;
    }
}

/* Page Header */
.page-header {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, var(--color-background-light) 0%, var(--color-background) 100%);
    text-align: center;
}

.page-header__title {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--spacing-lg);
    color: var(--color-text);
}

.page-header__description {
    font-size: var(--font-size-lg);
    color: var(--color-text-light);
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.6;
}

/* Training Detail Page */
.trainings-list {
    padding: var(--spacing-3xl) 0;
    background-color: var(--color-background);
}

.trainings-list__grid {
    display: grid;
    gap: var(--spacing-2xl);
    grid-template-columns: 1fr;
}

@media (min-width: 768px) {
    .trainings-list__grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .trainings-list__grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.training-detail {
    background-color: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.training-detail:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.training-detail__content {
    padding: var(--spacing-xl);
}

.training-detail__title {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

.training-detail__description {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.training-detail__meta {
    display: grid;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    grid-template-columns: 1fr;
}

@media (min-width: 480px) {
    .training-detail__meta {
        grid-template-columns: repeat(2, 1fr);
    }
}

.training-detail__info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.training-detail__label {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    font-weight: 500;
}

.training-detail__value {
    font-size: var(--font-size-base);
    color: var(--color-text);
    font-weight: 600;
}

.training-detail__tags {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.training-detail__cta {
    padding: 0 var(--spacing-xl) var(--spacing-xl);
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

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

.about__content {
    display: grid;
    gap: var(--spacing-3xl);
    grid-template-columns: 1fr;
    max-width: 1000px;
    margin: 0 auto;
}

@media (min-width: 768px) {
    .about__content {
        grid-template-columns: 300px 1fr;
        gap: var(--spacing-2xl);
    }
}

.about__photo {
    display: flex;
    justify-content: center;
}

.about__photo-placeholder {
    width: 200px;
    height: 200px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: var(--font-size-lg);
    font-weight: 600;
    text-align: center;
    line-height: 1.3;
}

.about__photo-text {
    max-width: 200px;
}

.about__photo-img {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    object-fit: cover;
    object-position: center 5%;
    box-shadow: var(--shadow-lg);
    border: 4px solid white;
}

.about__text h2 {
    color: var(--color-text);
    margin-bottom: var(--spacing-lg);
}

.about__text h3 {
    color: var(--color-text);
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
}

.about__text p {
    color: var(--color-text-light);
    line-height: 1.7;
    margin-bottom: var(--spacing-lg);
}

.about__strengths {
    list-style: none;
    margin-bottom: var(--spacing-xl);
}

.about__strengths li {
    position: relative;
    padding-left: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
    font-weight: 500;
}

.about__strengths li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: bold;
    font-size: var(--font-size-lg);
}

.about__cta {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    margin-top: var(--spacing-xl);
}

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

.contact__content {
    display: grid;
    gap: var(--spacing-3xl);
    grid-template-columns: 1fr;
    max-width: 1000px;
    margin: 0 auto;
}

@media (min-width: 768px) {
    .contact__content {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-2xl);
    }
}

.contact__info h2,
.contact__additional h2 {
    color: var(--color-text);
    margin-bottom: var(--spacing-xl);
}

.contact__details {
    display: grid;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}

.contact__item h3 {
    color: var(--color-primary);
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-sm);
}

.contact__item p {
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

.contact__link {
    color: var(--color-text);
    font-weight: 600;
    font-size: var(--font-size-lg);
    text-decoration: none;
}

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

.contact__note {
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
    font-style: italic;
}

.contact__cta {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.btn--large {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-lg);
    min-height: 56px;
}

.contact__photo {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xl);
}

.contact__photo-container {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    border: 4px solid white;
}

.contact__photo-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center 5%;
}

.contact__message {
    text-align: center;
    max-width: 400px;
}

.contact__message h3 {
    color: var(--color-primary);
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-md);
}

.contact__message p {
    color: var(--color-text-light);
    line-height: 1.6;
    font-size: var(--font-size-lg);
}

/* Utility classes */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}
/* ...materials from trainings ..*/
.materials-note {
    padding: var(--spacing-xl) 0;
    background: var(--color-background-light);
    margin-top: -1rem;
}
.materials-note__box {
    background: var(--color-background);
    border: 1px solid var(--color-border, #e3e6ec);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-sm);
    line-height: 1.5;
    box-shadow: var(--shadow-sm);
}

.materials-section {
    padding: var(--spacing-2xl) 0 var(--spacing-xl);
    border-top: 1px solid var(--color-border, #e3e6ec);
}
.materials-section:first-of-type {
    border-top: none;
}
.materials-section__title {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-xl);
    color: var(--color-text);
}

.materials-grid {
    display: grid;
    gap: var(--spacing-xl);
    grid-template-columns: 1fr;
}
@media (min-width: 700px) {
    .materials-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1100px) {
    .materials-grid { grid-template-columns: repeat(3, 1fr); }
}

.material-card {
    background: var(--color-background);
    border: 1px solid var(--color-border, #e3e6ec);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}
.material-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}
.material-card__title {
    font-size: var(--font-size-lg);
    margin: 0;
    color: var(--color-primary);
}
.material-card__desc {
    color: var(--color-text-light);
    line-height: 1.5;
    flex: 1;
}

.materials-links {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: var(--spacing-sm);
    max-width: 600px;
}
.materials-links a {
    text-decoration: none;
    color: var(--color-primary);
    font-weight: 500;
    position: relative;
}
.materials-links a::after {
    content: '↗';
    font-size: 0.75em;
    margin-left: 4px;
    opacity: 0.7;
}
.materials-links a:hover {
    text-decoration: underline;
}