/**
 * Main Stylesheet - Material Design
 * Официальный профессиональный дизайн для благотворительного фонда
 */

@import url('variables.css');
@import url('base.css');
@import url('components.css');
@import url('performance.css');

/* ============================================
   HEADER & NAVIGATION - Material Design App Bar
   ============================================ */
.header {
    background-color: var(--md-surface);
    box-shadow: var(--elevation-2);
    position: sticky;
    top: 0;
    z-index: var(--z-app-bar);
    border-bottom: 1px solid rgba(0, 0, 0, 0.12);
    transition: box-shadow var(--duration-medium2) var(--transition-standard);
}

.navbar {
    padding: var(--spacing-3) 0;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-img {
    height: 48px;
    width: auto;
    object-fit: contain;
    transition: transform var(--duration-short2) var(--transition-standard);
}

.logo-img:hover {
    transform: scale(1.05);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-4);
    margin: 0;
    padding: 0;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: var(--font-weight-medium);
    font-size: var(--font-size-body1);
    position: relative;
    padding: var(--spacing-2) var(--spacing-3);
    border-radius: var(--radius-small);
    transition: background-color var(--duration-short2) var(--transition-standard),
                color var(--duration-short2) var(--transition-standard);
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background-color: var(--md-primary);
    transition: width var(--duration-medium2) var(--transition-standard);
    border-radius: 2px 2px 0 0;
}

.nav-menu a:hover {
    background-color: rgba(25, 118, 210, 0.04);
    color: var(--md-primary);
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
    width: calc(100% - 16px);
}

.nav-menu a.active {
    color: var(--md-primary);
    background-color: rgba(25, 118, 210, 0.08);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
    padding: var(--spacing-2);
    border-radius: var(--radius-small);
    transition: background-color var(--duration-short2) var(--transition-standard);
}

.hamburger:hover {
    background-color: rgba(0, 0, 0, 0.04);
}

.hamburger span {
    width: 24px;
    height: 2px;
    background-color: var(--text-primary);
    border-radius: 2px;
    transition: all var(--duration-short2) var(--transition-standard);
}

/* ============================================
   HERO SECTION - Material Design
   ============================================ */
.hero {
    background: url('../images/bg.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    color: var(--text-on-primary);
    padding: var(--spacing-24) 0 var(--spacing-20);
    text-align: center;
    position: relative;
    overflow: hidden;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 1;
}

.hero-content {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
    width: 100%;
    padding: 0 var(--spacing-4);
}

.hero-title {
    font-size: var(--font-size-h2);
    font-weight: var(--font-weight-light);
    margin-bottom: var(--spacing-4);
    line-height: var(--line-height-tight);
    color: var(--text-on-primary);
    letter-spacing: -0.01562em;
    animation: fadeInUp var(--duration-long2) var(--transition-decelerate);
}

.hero-subtitle {
    font-size: var(--font-size-h6);
    margin-bottom: var(--spacing-6);
    font-weight: var(--font-weight-regular);
    line-height: var(--line-height-normal);
    color: rgba(255, 255, 255, 0.87);
    letter-spacing: 0.00938em;
    animation: fadeInUp var(--duration-long2) var(--transition-decelerate) 100ms;
}

.hero-mission {
    font-size: var(--font-size-h6);
    margin-top: var(--spacing-6);
    font-weight: var(--font-weight-regular);
    line-height: var(--line-height-relaxed);
    color: var(--text-on-primary);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    padding: var(--spacing-6) var(--spacing-8);
    background-color: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-large);
    box-shadow: var(--elevation-4);
    position: relative;
    animation: fadeInUp var(--duration-long2) var(--transition-decelerate) 200ms;
}

.hero-cta-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-top: var(--spacing-6);
    padding: var(--spacing-3) var(--spacing-8);
    min-width: 200px;
    height: 48px;
    background-color: var(--md-surface);
    color: var(--md-primary);
    font-size: var(--font-size-button);
    font-weight: var(--font-weight-medium);
    text-transform: uppercase;
    letter-spacing: 0.08929em;
    text-decoration: none;
    border-radius: var(--radius-medium);
    box-shadow: var(--elevation-8);
    transition: box-shadow var(--duration-short4) var(--transition-standard),
                transform var(--duration-short2) var(--transition-standard),
                background-color var(--duration-short2) var(--transition-standard);
    position: relative;
    overflow: hidden;
    z-index: 1;
    animation: fadeInUp var(--duration-long2) var(--transition-decelerate) 300ms;
}

.hero-cta-button::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(25, 118, 210, 0.1);
    transform: translate(-50%, -50%);
    transition: width var(--duration-medium2) var(--transition-standard),
                height var(--duration-medium2) var(--transition-standard);
    pointer-events: none;
}

.hero-cta-button:hover::before {
    width: 200px;
    height: 200px;
}

.hero-cta-button:hover {
    box-shadow: var(--elevation-12);
    transform: translateY(-2px);
    background-color: var(--md-surface);
}

.hero-cta-button:active {
    box-shadow: var(--elevation-4);
    transform: translateY(0);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================
   SOUND HEALING CTA SECTION
   ============================================ */
.sound-healing-cta-section {
    background-color: var(--md-surface-variant);
    padding: var(--spacing-20) 0;
    position: relative;
    overflow: hidden;
}

.sound-healing-cta-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
    position: relative;
    z-index: 2;
    background-color: var(--md-surface);
    padding: var(--spacing-8);
    border-radius: var(--radius-large);
    box-shadow: var(--elevation-4);
}

.sound-healing-cta-title {
    font-size: var(--font-size-h4);
    font-weight: var(--font-weight-light);
    margin-bottom: var(--spacing-4);
    color: var(--md-primary);
    letter-spacing: -0.01562em;
}

.sound-healing-cta-text {
    font-size: var(--font-size-body1);
    line-height: var(--line-height-relaxed);
    color: var(--text-primary);
    margin-bottom: var(--spacing-6);
    text-align: left;
}

.sound-healing-cta-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-3) var(--spacing-8);
    min-width: 200px;
    height: 48px;
    background-color: var(--md-primary);
    color: var(--text-on-primary);
    font-size: var(--font-size-button);
    font-weight: var(--font-weight-medium);
    text-transform: uppercase;
    letter-spacing: 0.08929em;
    text-decoration: none;
    border-radius: var(--radius-medium);
    box-shadow: var(--elevation-4);
    transition: box-shadow var(--duration-short4) var(--transition-standard),
                transform var(--duration-short2) var(--transition-standard),
                background-color var(--duration-short2) var(--transition-standard);
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.sound-healing-cta-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s ease;
    pointer-events: none;
    z-index: 0;
}

.sound-healing-cta-button:hover::before {
    left: 100%;
}

.sound-healing-cta-button:hover {
    box-shadow: var(--elevation-8);
    transform: translateY(-2px);
    background-color: var(--md-primary-dark);
}

.sound-healing-cta-button:active {
    transform: translateY(-1px);
}

/* ============================================
   SECTION IMAGES WITH OVERLAY
   ============================================ */
.section-image,
.about-section-image,
.mission-image,
.concept-item-image,
.additional-item-image,
.principle-card-image,
.principle-item-image,
.avoid-item-image,
.tool-item-image,
.implementation-item-image {
    width: 100%;
    height: auto;
    object-fit: cover;
    border-radius: 15px;
    position: relative;
    display: block;
}

/* Image Wrapper with Dark Overlay */
.concept-image-wrapper,
.about-image-wrapper,
.mission-image-wrapper {
    position: relative;
    margin-bottom: 3rem;
    border-radius: 15px;
    overflow: hidden;
    display: block;
}

.concept-image-wrapper img,
.about-image-wrapper img,
.mission-image-wrapper img {
    display: block;
    width: 100%;
    height: auto;
}

.concept-image-wrapper::after,
.about-image-wrapper::after,
.mission-image-wrapper::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom, rgba(0, 0, 0, 0.2), rgba(0, 0, 0, 0.5));
    pointer-events: none;
    border-radius: 15px;
    z-index: 1;
}

/* Concept Item Images with Overlay */
.concept-item {
    position: relative;
    margin-bottom: var(--spacing-4);
    background-color: var(--md-surface);
    border-radius: var(--radius-large);
    padding: var(--spacing-4);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-4);
    box-shadow: var(--elevation-1);
    transition: box-shadow var(--duration-medium2) var(--transition-standard),
                transform var(--duration-short4) var(--transition-standard);
    overflow: hidden;
}

.concept-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background-color: var(--md-primary);
    opacity: 0;
    transition: opacity var(--duration-medium2) var(--transition-standard);
}

.concept-item:hover {
    box-shadow: var(--elevation-4);
    transform: translateY(-2px);
}

.concept-item:hover::before {
    opacity: 1;
}

.concept-item-image {
    width: 120px;
    height: 120px;
    object-fit: cover;
    border-radius: var(--radius-medium);
    flex-shrink: 0;
    position: relative;
    overflow: hidden;
    display: block;
    box-shadow: var(--elevation-2);
}

/* ============================================
   SOCIAL SECTION - СОЦІАЛЬНІ МЕРЕЖІ
   ============================================ */
.social-section {
    padding: 100px 0;
    background: 
        linear-gradient(135deg, #ffffff 0%, #f8f9ff 50%, #f0f4ff 100%),
        radial-gradient(circle at 50% 50%, rgba(102, 126, 234, 0.05) 0%, transparent 70%);
    position: relative;
}

.social-grid {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 4rem;
    margin-top: 3rem;
    flex-wrap: wrap;
}

.social-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    text-decoration: none;
    color: var(--text-dark);
    padding: 2rem 3rem;
    background: var(--bg-white);
    border-radius: 25px;
    border: 3px solid var(--border-color);
    position: relative;
    overflow: hidden;
    min-width: 180px;
}

.social-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-gradient);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.social-link:hover::before {
    opacity: 0.1;
}

.social-icon {
    width: 60px;
    height: 60px;
    object-fit: contain;
    position: relative;
    z-index: 1;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

.social-link span {
    font-weight: 600;
    font-size: 1.1rem;
    position: relative;
    z-index: 1;
    color: var(--text-dark);
}

.social-link:hover span {
    color: var(--primary-color);
}

/* ============================================
   CONCEPT SECTION - СОВРЕМЕННЫЙ ДИЗАЙН
   ============================================ */
.concept-section {
    padding: var(--spacing-20) 0;
    background-color: var(--md-background);
    position: relative;
    overflow: hidden;
}

.concept-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary-color), transparent);
    opacity: 0.3;
}

.concept-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    margin-top: 4rem;
}

.concept-column {
    padding: 3.5rem;
    border-radius: 30px;
    background: var(--bg-white);
    border: 3px solid transparent;
    position: relative;
    overflow: hidden;
}

.concept-column::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: 30px;
    padding: 3px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    z-index: -1;
}

.concept-column.negative {
    background: linear-gradient(135deg, #fff5f5 0%, #ffffff 50%, #fffbfb 100%);
    border-image: linear-gradient(135deg, #fecaca, #f87171) 1;
}

.concept-column.negative::before {
    background: linear-gradient(135deg, #fecaca, #f87171);
}

.concept-column.positive {
    background: linear-gradient(135deg, #f0fdf4 0%, #ffffff 50%, #f0fdf9 100%);
    border-image: linear-gradient(135deg, #a7f3d0, #10b981) 1;
}

.concept-column.positive::before {
    background: linear-gradient(135deg, #a7f3d0, #10b981);
}

.concept-title {
    font-size: 3rem;
    margin-bottom: 3rem;
    text-align: center;
    font-weight: 900;
    letter-spacing: -1px;
    position: relative;
    padding-bottom: 1.5rem;
}

.concept-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    border-radius: 2px;
}

.negative-title {
    background: var(--bg-gradient-error);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.negative-title::after {
    background: linear-gradient(90deg, #fecaca, #f87171);
}

.positive-title {
    background: var(--bg-gradient-success);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.positive-title::after {
    background: linear-gradient(90deg, #a7f3d0, #10b981);
}

.concept-icon {
    font-size: 2.5rem;
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 15px;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.15), rgba(118, 75, 162, 0.15));
    border: 2px solid rgba(102, 126, 234, 0.2);
}

/* ============================================
   CONCLUSIONS SECTION - СОВРЕМЕННЫЙ ДИЗАЙН
   ============================================ */
.conclusions-section {
    padding: var(--spacing-20) 0;
    background-color: var(--md-surface);
    position: relative;
}

.conclusions-content {
    max-width: 1000px;
    margin: 0 auto;
    text-align: center;
    padding: 4rem 4rem;
    background: linear-gradient(135deg, #ffffff 0%, #f8f9ff 50%, #ffffff 100%);
    border-radius: 40px;
    border: 3px solid transparent;
    position: relative;
    overflow: hidden;
}

.conclusions-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 6px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color), var(--primary-color));
    border-radius: 40px 40px 0 0;
}

.conclusions-content::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(102, 126, 234, 0.05) 0%, transparent 70%);
    z-index: 0;
}

.conclusions-content p {
    font-size: 1.5rem;
    line-height: 2;
    color: var(--text-medium);
    font-weight: 400;
    margin-bottom: 2.5rem;
    position: relative;
    z-index: 1;
}

/* ============================================
   STATS GRID - СОВРЕМЕННЫЙ ДИЗАЙН
   ============================================ */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2.5rem;
    margin-top: 4rem;
    position: relative;
    z-index: 1;
}

.stat-item {
    padding: var(--spacing-6) var(--spacing-4);
    background-color: var(--md-surface);
    border-radius: var(--radius-large);
    text-align: center;
    box-shadow: var(--elevation-2);
    position: relative;
    overflow: hidden;
    transition: box-shadow var(--duration-medium2) var(--transition-standard),
                transform var(--duration-short4) var(--transition-standard);
}

.stat-item:hover {
    box-shadow: var(--elevation-4);
    transform: translateY(-4px);
}

.stat-number {
    font-size: var(--font-size-h2);
    font-weight: var(--font-weight-light);
    color: var(--md-primary);
    margin-bottom: var(--spacing-2);
    line-height: var(--line-height-tight);
    letter-spacing: -0.01562em;
}

.stat-label {
    font-size: var(--font-size-body1);
    color: var(--text-secondary);
    font-weight: var(--font-weight-medium);
    text-transform: uppercase;
    letter-spacing: 0.08929em;
}

/* ============================================
   ADDITIONAL SECTION - СОВРЕМЕННЫЙ ДИЗАЙН
   ============================================ */
.additional-section {
    padding: var(--spacing-20) 0;
    background-color: var(--md-background);
    position: relative;
}

.additional-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 3.5rem;
    margin-top: 4rem;
}

.additional-item {
    background-color: var(--md-surface);
    border-radius: var(--radius-large);
    padding: var(--spacing-6);
    box-shadow: var(--elevation-2);
    position: relative;
    overflow: hidden;
    transition: box-shadow var(--duration-medium2) var(--transition-standard),
                transform var(--duration-short4) var(--transition-standard);
}

.additional-item:hover {
    box-shadow: var(--elevation-8);
    transform: translateY(-4px);
}

.additional-item-image {
    width: 100%;
    height: 240px;
    object-fit: cover;
    border-radius: var(--radius-medium);
    margin-bottom: var(--spacing-4);
    position: relative;
    box-shadow: var(--elevation-2);
}

.additional-icon {
    font-size: 5rem;
    margin-bottom: 2rem;
    display: inline-block;
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.1));
}

.additional-item h3 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: var(--text-dark);
    font-weight: 800;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, var(--text-dark) 0%, var(--primary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.additional-item p {
    color: var(--text-medium);
    line-height: 1.8;
    font-size: 1.05rem;
}

/* ============================================
   SECTION TITLE - Material Design Typography
   ============================================ */
.section-title {
    text-align: center;
    font-size: var(--font-size-h4);
    font-weight: var(--font-weight-light);
    margin-bottom: var(--spacing-8);
    color: var(--text-primary);
    letter-spacing: -0.01562em;
    position: relative;
    display: block;
    width: 100%;
    padding-bottom: var(--spacing-4);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 64px;
    height: 4px;
    background-color: var(--md-primary);
    border-radius: 2px;
}

/* ============================================
   PAGE HEADER - Material Design
   ============================================ */
.page-header {
    background: url('../images/bg.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    color: var(--text-on-primary);
    padding: var(--spacing-20) 0 var(--spacing-12);
    text-align: center;
    position: relative;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 1;
}

.page-header h1 {
    font-size: var(--font-size-h3);
    font-weight: var(--font-weight-light);
    margin-bottom: var(--spacing-3);
    position: relative;
    z-index: 2;
    color: var(--text-on-primary);
    letter-spacing: -0.01562em;
}

.page-subtitle {
    font-size: var(--font-size-h6);
    font-weight: var(--font-weight-regular);
    color: rgba(255, 255, 255, 0.87);
    position: relative;
    z-index: 2;
    letter-spacing: 0.00938em;
}

/* ============================================
   ABOUT PAGE
   ============================================ */
.about-detail {
    padding: 80px 0;
}

.content-section {
    margin-bottom: var(--spacing-16);
}

.content-section h2 {
    font-size: var(--font-size-h4);
    font-weight: var(--font-weight-light);
    margin-bottom: var(--spacing-6);
    color: var(--text-primary);
    letter-spacing: -0.01562em;
}

.content-section p {
    font-size: var(--font-size-body1);
    line-height: var(--line-height-relaxed);
    color: var(--text-primary);
    margin-bottom: var(--spacing-4);
    max-width: 900px;
}

/* About Section Images */
.about-image-wrapper {
    position: relative;
    margin: 2rem 0;
    border-radius: 20px;
    overflow: hidden;
}

.about-section-image {
    width: 100%;
    height: 400px;
    object-fit: cover;
}

.about-image-wrapper::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom, rgba(0, 0, 0, 0.2), rgba(0, 0, 0, 0.5));
    pointer-events: none;
}

/* ============================================
   PRINCIPLES GRID
   ============================================ */
.principles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.principle-card {
    background: var(--bg-white);
    border-radius: 20px;
    padding: 2rem;
    border: 2px solid var(--border-color);
    text-align: center;
    overflow: hidden;
}

.principle-card-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 15px;
    margin-bottom: 1.5rem;
    position: relative;
}

.principle-card-image::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.3);
    pointer-events: none;
    border-radius: 15px;
}

.principle-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
    font-weight: 700;
}

.principle-card p {
    color: var(--text-medium);
    line-height: 1.6;
}

/* Tools List */
.tools-list {
    margin-top: 2rem;
}

.tool-item {
    display: flex;
    align-items: center;
    gap: 2rem;
    padding: 2rem;
    background: var(--bg-white);
    border-radius: 20px;
    border: 2px solid var(--border-color);
    margin-bottom: 2rem;
}

.tool-item-image {
    width: 400px;
    height: 250px;
    object-fit: cover;
    border-radius: 15px;
    flex-shrink: 0;
    position: relative;
}

.tool-item-image::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.3);
    pointer-events: none;
    border-radius: 15px;
}

.tool-icon {
    font-size: 4rem;
    flex-shrink: 0;
}

.tool-item h3 {
    font-size: 1.75rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
    font-weight: 700;
}

.tool-item p {
    color: var(--text-medium);
    line-height: 1.7;
}

/* ============================================
   PROJECTS PAGE
   ============================================ */
.concept-detail {
    padding: 80px 0;
}

.concept-detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-top: 2rem;
}

.principle-list,
.avoid-list {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.principle-item,
.avoid-item {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
    padding: 1.5rem;
    background: var(--bg-white);
    border-radius: 15px;
    border: 2px solid var(--border-color);
}

.principle-item-image,
.avoid-item-image {
    width: 200px;
    height: 150px;
    object-fit: cover;
    border-radius: 12px;
    flex-shrink: 0;
    position: relative;
}

.principle-item-image::after,
.avoid-item-image::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.3);
    pointer-events: none;
    border-radius: 12px;
}

.principle-item h4,
.avoid-item h4 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
    font-weight: 700;
}

.principle-item p,
.avoid-item p {
    color: var(--text-medium);
    line-height: 1.6;
}

/* Implementation Section */
.implementation-section {
    padding: 80px 0;
    background: linear-gradient(135deg, #f8f9ff 0%, #ffffff 100%);
}

.implementation-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 3rem;
    margin-top: 3rem;
}

.implementation-item {
    background: var(--bg-white);
    border-radius: 20px;
    padding: 2.5rem;
    border: 2px solid var(--border-color);
    text-align: center;
}

.implementation-item-image {
    width: 100%;
    height: 250px;
    object-fit: cover;
    border-radius: 15px;
    margin-bottom: 1.5rem;
    position: relative;
}

.implementation-item-image::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.3);
    pointer-events: none;
    border-radius: 15px;
}

.implementation-icon {
    font-size: 4rem;
    margin-bottom: 1.5rem;
}

.implementation-item h3 {
    font-size: 1.75rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
    font-weight: 700;
}

.implementation-item p {
    color: var(--text-medium);
    line-height: 1.7;
}

/* ============================================
   FOOTER - Material Design
   ============================================ */
.footer {
    background-color: var(--md-secondary-dark);
    color: var(--text-on-primary);
    padding: var(--spacing-12) 0 var(--spacing-6);
    margin-top: var(--spacing-16);
    box-shadow: var(--elevation-4);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-8);
    margin-bottom: var(--spacing-6);
}

@media (max-width: 768px) {
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-6);
    }
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 1rem;
    color: var(--text-white);
}

.footer-section ul {
    list-style: none;
    padding: 0;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
}

.footer-section a:hover {
    color: var(--text-white);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
}

/* ============================================
   RESPONSIVE DESIGN - АДАПТИВНАЯ ВЕРСИЯ
   ============================================ */

/* Планшеты и небольшие ноутбуки (769px - 1024px) */
@media (max-width: 1024px) {
    .container {
        padding: 0 2rem;
    }

    .hero-title {
        font-size: 4.5rem;
    }

    .section-title {
        font-size: 3rem;
    }

    .concept-grid {
        gap: 2.5rem;
    }

    .concept-column {
        padding: 2.5rem;
    }
}

/* Планшеты (481px - 768px) */
@media (max-width: 768px) {
    .container {
        padding: 0 1.5rem;
    }

    /* Навигация */
    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 64px;
        flex-direction: column;
        background-color: var(--md-surface);
        box-shadow: var(--elevation-8);
        width: 100%;
        text-align: left;
        transition: left var(--duration-medium2) var(--transition-standard);
        padding: var(--spacing-4) 0;
        gap: 0;
        border-top: 1px solid rgba(0, 0, 0, 0.12);
        z-index: var(--z-drawer);
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-menu li {
        padding: 0;
        width: 100%;
    }

    .nav-menu a {
        display: block;
        padding: var(--spacing-3) var(--spacing-4);
        font-size: var(--font-size-body1);
        width: 100%;
    }

    .logo-img {
        height: 2.5rem;
    }

    /* Hero секция */
    .hero {
        min-height: 500px;
        padding: var(--spacing-16) 0 var(--spacing-12);
        background-attachment: scroll;
    }

    .hero-title {
        font-size: var(--font-size-h3);
        padding: 0 var(--spacing-4);
    }

    .hero-subtitle {
        font-size: var(--font-size-body1);
        padding: 0 var(--spacing-4);
    }

    .hero-mission {
        font-size: var(--font-size-body1);
        padding: var(--spacing-4) var(--spacing-4);
        margin-top: var(--spacing-4);
    }

    .hero-cta-button {
        font-size: var(--font-size-button);
        padding: var(--spacing-3) var(--spacing-6);
        margin-top: var(--spacing-4);
        min-width: 180px;
        height: 44px;
    }

    /* Sound Healing CTA Section */
    .sound-healing-cta-section {
        padding: 60px 0;
    }

    .sound-healing-cta-title {
        font-size: 2rem;
        margin-bottom: 1.5rem;
    }

    .sound-healing-cta-text {
        font-size: 1.1rem;
        margin-bottom: 2rem;
        padding: 0 1rem;
        line-height: 1.7;
    }

    .sound-healing-cta-button {
        font-size: 1rem;
        padding: 1rem 2.5rem;
    }

    /* Секции */
    .social-section {
        padding: 80px 0;
    }

    .social-grid {
        gap: 2.5rem;
    }

    .social-link {
        min-width: 150px;
        padding: 1.5rem 2rem;
    }

    .social-icon {
        width: 50px;
        height: 50px;
    }

    .concept-section,
    .conclusions-section,
    .additional-section {
        padding: 80px 0;
    }

    .section-title {
        font-size: 2.5rem;
        margin-bottom: 2.5rem;
        padding-bottom: 1.5rem;
    }

    .section-title::after {
        width: 80px;
        height: 4px;
    }

    /* Концепт секция */
    .concept-grid,
    .concept-detail-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
        margin-top: 2.5rem;
    }

    .concept-column {
        padding: 2rem;
        border-radius: 25px;
    }

    .concept-title {
        font-size: 2.25rem;
        margin-bottom: 2rem;
    }

    .concept-item {
        flex-direction: column;
        padding: 1.5rem;
        margin-bottom: 1.5rem;
        gap: 1rem;
    }

    .concept-item-image {
        width: 100%;
        height: 220px;
        border-radius: 15px;
    }

    .concept-item strong {
        font-size: 1.1rem;
    }

    .concept-item p {
        font-size: 0.95rem;
        line-height: 1.6;
    }

    /* Изображения секций */
    .concept-image-wrapper,
    .section-image {
        margin-bottom: 2rem;
    }

    /* Выводы секция */
    .conclusions-content {
        padding: 2.5rem 2rem;
        border-radius: 30px;
    }

    .conclusions-content p {
        font-size: 1.2rem;
        line-height: 1.8;
        margin-bottom: 2rem;
    }

    .stats-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        margin-top: 2.5rem;
    }

    .stat-item {
        padding: 2rem 1.5rem;
    }

    .stat-number {
        font-size: 3rem;
    }

    .stat-label {
        font-size: 0.9rem;
    }

    /* Дополнительная секция */
    .additional-grid,
    .implementation-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
        margin-top: 2.5rem;
    }

    .additional-item {
        padding: 2rem;
        border-radius: 25px;
    }

    .additional-item-image {
        height: 220px;
        margin-bottom: 1.5rem;
    }

    .additional-item h3 {
        font-size: 1.75rem;
        margin-bottom: 1rem;
    }

    .additional-item p {
        font-size: 1rem;
        line-height: 1.7;
    }

    /* Принципы и избегания */
    .principle-item,
    .avoid-item {
        flex-direction: column;
        padding: 1.5rem;
        gap: 1rem;
    }

    .principle-item-image,
    .avoid-item-image {
        width: 100%;
        height: 200px;
    }

    .principle-item h4,
    .avoid-item h4 {
        font-size: 1.3rem;
    }

    .principle-item p,
    .avoid-item p {
        font-size: 0.95rem;
    }

    /* Инструменты */
    .tool-item {
        flex-direction: column;
        text-align: center;
        padding: 2rem 1.5rem;
    }

    .tool-item-image {
        width: 100%;
        height: 220px;
        margin-bottom: 1.5rem;
    }

    .tool-item h3 {
        font-size: 1.5rem;
    }

    .tool-item p {
        font-size: 1rem;
    }

    /* Реализация */
    .implementation-item {
        padding: 2rem 1.5rem;
    }

    .implementation-item-image {
        height: 220px;
    }

    .implementation-item h3 {
        font-size: 1.5rem;
    }

    .implementation-item p {
        font-size: 1rem;
    }

    /* Заголовок страницы */
    .page-header {
        background-attachment: scroll;
        padding: 100px 0 80px;
    }

    .page-header h1 {
        font-size: 2.5rem;
    }

    .page-subtitle {
        font-size: 1.1rem;
    }

    /* О нас */
    .about-detail {
        padding: 60px 0;
    }

    .content-section {
        padding: 2rem 0;
    }

    .content-section h2 {
        font-size: 2rem;
        margin-bottom: 1.5rem;
    }

    .content-section p {
        font-size: 1.05rem;
        line-height: 1.7;
        margin-bottom: 1.5rem;
    }

    /* Футер */
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }

    .footer-section {
        padding: 1.5rem 0;
    }

    .footer-section h3,
    .footer-section h4 {
        font-size: 1.25rem;
        margin-bottom: 1rem;
    }
}

/* Мобильные телефоны (до 480px) */
@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }

    /* Навигация */
    .logo-img {
        height: 2rem;
    }

    .hamburger span {
        width: 22px;
        height: 2px;
    }

    /* Hero секция */
    .hero {
        height: 450px;
        padding: 100px 0 80px;
    }

    .hero-title {
        font-size: 2.25rem;
        letter-spacing: -1px;
        margin-bottom: 1.5rem;
    }

    .hero-subtitle {
        font-size: 0.95rem;
        letter-spacing: 1px;
        margin-bottom: 2rem;
    }

    .hero-mission {
        font-size: 1.1rem;
        padding: 1.5rem 1rem;
        margin-top: 1.5rem;
        line-height: 1.4;
    }

    /* Секции */
    .social-section {
        padding: 60px 0;
    }

    .social-grid {
        gap: 1.5rem;
        flex-direction: column;
    }

    .social-link {
        min-width: 100%;
        padding: 1.5rem;
        flex-direction: row;
        justify-content: center;
    }

    .social-icon {
        width: 40px;
        height: 40px;
    }

    .social-link span {
        font-size: 1rem;
    }

    .concept-section,
    .conclusions-section,
    .additional-section,
    .concept-detail,
    .implementation-section,
    .about-detail {
        padding: 60px 0;
    }

    .section-title {
        font-size: 1.75rem;
        margin-bottom: 2rem;
        padding-bottom: 1rem;
        letter-spacing: -1px;
    }

    .section-title::after {
        width: 60px;
        height: 3px;
    }

    /* Концепт секция */
    .concept-grid,
    .concept-detail-grid {
        gap: 1.5rem;
        margin-top: 2rem;
    }

    .concept-column {
        padding: 1.5rem;
        border-radius: 20px;
    }

    .concept-title {
        font-size: 1.75rem;
        margin-bottom: 1.5rem;
    }

    .concept-title::after {
        width: 60px;
        height: 3px;
    }

    .concept-item {
        padding: 1.25rem;
        margin-bottom: 1.25rem;
        border-radius: 15px;
    }

    .concept-item-image {
        height: 180px;
        border-radius: 12px;
    }

    .concept-item strong {
        font-size: 1rem;
        display: block;
        margin-bottom: 0.5rem;
    }

    .concept-item p {
        font-size: 0.9rem;
        line-height: 1.5;
    }

    /* Изображения */
    .concept-image-wrapper {
        margin-bottom: 1.5rem;
    }

    .section-image {
        border-radius: 12px;
    }

    /* Выводы секция */
    .conclusions-content {
        padding: 2rem 1.5rem;
        border-radius: 25px;
    }

    .conclusions-content p {
        font-size: 1.05rem;
        line-height: 1.7;
        margin-bottom: 1.5rem;
    }

    .stats-grid {
        gap: 1.25rem;
        margin-top: 2rem;
    }

    .stat-item {
        padding: 1.5rem 1rem;
        border-radius: 20px;
    }

    .stat-number {
        font-size: 2.5rem;
        margin-bottom: 0.75rem;
    }

    .stat-label {
        font-size: 0.85rem;
    }

    /* Дополнительная секция */
    .additional-grid,
    .implementation-grid {
        gap: 1.5rem;
        margin-top: 2rem;
    }

    .additional-item {
        padding: 1.5rem;
        border-radius: 20px;
    }

    .additional-item-image {
        height: 180px;
        margin-bottom: 1.25rem;
        border-radius: 12px;
    }

    .additional-item h3 {
        font-size: 1.5rem;
        margin-bottom: 0.75rem;
    }

    .additional-item p {
        font-size: 0.95rem;
        line-height: 1.6;
    }

    /* Принципы */
    .principle-list,
    .avoid-list {
        gap: 1.25rem;
    }

    .principle-item,
    .avoid-item {
        padding: 1.25rem;
        border-radius: 15px;
    }

    .principle-item-image,
    .avoid-item-image {
        height: 160px;
        border-radius: 10px;
    }

    .principle-item h4,
    .avoid-item h4 {
        font-size: 1.15rem;
        margin-bottom: 0.5rem;
    }

    .principle-item p,
    .avoid-item p {
        font-size: 0.9rem;
        line-height: 1.5;
    }

    /* Инструменты */
    .tool-item {
        padding: 1.5rem 1rem;
        border-radius: 20px;
    }

    .tool-item-image {
        height: 180px;
        margin-bottom: 1.25rem;
        border-radius: 12px;
    }

    .tool-item h3 {
        font-size: 1.3rem;
        margin-bottom: 0.75rem;
    }

    .tool-item p {
        font-size: 0.95rem;
        line-height: 1.6;
    }

    /* Реализация */
    .implementation-item {
        padding: 1.5rem 1rem;
        border-radius: 20px;
    }

    .implementation-item-image {
        height: 180px;
        border-radius: 12px;
    }

    .implementation-item h3 {
        font-size: 1.3rem;
        margin-bottom: 0.75rem;
    }

    .implementation-item p {
        font-size: 0.95rem;
        line-height: 1.6;
    }

    /* Заголовок страницы */
    .page-header {
        padding: 80px 0 60px;
    }

    .page-header h1 {
        font-size: 2rem;
    }

    .page-subtitle {
        font-size: 1rem;
    }

    /* О нас */
    .about-detail {
        padding: 50px 0;
    }

    .content-section {
        padding: 1.5rem 0;
    }

    .content-section h2 {
        font-size: 1.75rem;
        margin-bottom: 1.25rem;
    }

    .content-section p {
        font-size: 1rem;
        line-height: 1.6;
        margin-bottom: 1.25rem;
    }

    /* Футер */
    .footer {
        padding: 3rem 0 2rem;
    }

    .footer-content {
        gap: 1.5rem;
    }

    .footer-section {
        padding: 1.25rem 0;
    }

    .footer-section h3,
    .footer-section h4 {
        font-size: 1.1rem;
        margin-bottom: 0.75rem;
    }

    .footer-section p,
    .footer-section li {
        font-size: 0.9rem;
    }

    .footer-bottom {
        margin-top: 2rem;
        padding-top: 1.5rem;
    }

    .footer-bottom p {
        font-size: 0.85rem;
    }
}

/* Очень маленькие экраны (до 360px) */
@media (max-width: 360px) {
    .container {
        padding: 0 0.75rem;
    }

    .hero-title {
        font-size: 1.9rem;
    }

    .hero-subtitle {
        font-size: 0.85rem;
    }

    .hero-mission {
        font-size: 1rem;
        padding: 1.25rem 0.75rem;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .concept-title {
        font-size: 1.5rem;
    }

    .stat-number {
        font-size: 2rem;
    }
}