:root {
    --primary-color: #1a1d29;
    --secondary-color: #2563eb;
    --accent-color: #0ea5e9;
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --border-color: #e2e8f0;
    --shadow: rgba(15, 23, 42, 0.08);
    --shadow-hover: rgba(15, 23, 42, 0.12);
    --shadow-lg: rgba(15, 23, 42, 0.15);
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-accent: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
    --primary-color: #f1f5f9;
    --secondary-color: #60a5fa;
    --accent-color: #38bdf8;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --border-color: #475569;
    --shadow: rgba(0, 0, 0, 0.3);
    --shadow-hover: rgba(0, 0, 0, 0.4);
    --shadow-lg: rgba(0, 0, 0, 0.5);
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-accent: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    line-height: 1.75;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    transition: background-color 0.4s ease, color 0.4s ease;
    overflow-x: hidden;
    font-weight: 400;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    box-shadow: 0 1px 3px var(--shadow);
    z-index: 1000;
    padding: 1.25rem 0;
    transition: var(--transition);
    border-bottom: 1px solid var(--border-color);
    overflow: hidden;
}

[data-theme="dark"] .navbar {
    background-color: rgba(15, 23, 42, 0.8);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.logo-text {
    font-size: 1.75rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 3px;
    transition: var(--transition);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
    position: relative;
    padding: 0.5rem 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width 0.3s ease;
}

.nav-link:hover {
    color: var(--text-primary);
}

.nav-link:hover::after {
    width: 100%;
}

.burger-menu {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 32px;
    height: 24px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1001;
    position: relative;
}

.burger-line {
    width: 100%;
    height: 3px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
    transform-origin: center;
}

.burger-menu.active .burger-line:nth-child(1) {
    transform: translateY(10.5px) rotate(45deg);
}

.burger-menu.active .burger-line:nth-child(2) {
    opacity: 0;
    transform: scale(0);
}

.burger-menu.active .burger-line:nth-child(3) {
    transform: translateY(-10.5px) rotate(-45deg);
}

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
    padding: 8rem 2rem 4rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.ripple-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

.ripple {
    position: absolute;
    border: 2px solid;
    border-color: var(--secondary-color);
    border-radius: 50%;
    opacity: 0;
    pointer-events: none;
    filter: blur(1px);
}

.ripple-1 {
    width: 100px;
    height: 100px;
    top: 20%;
    left: 15%;
    animation: rippleExpand 8s ease-out infinite;
    animation-delay: 0s;
}

.ripple-2 {
    width: 150px;
    height: 150px;
    top: 60%;
    right: 20%;
    animation: rippleExpand 10s ease-out infinite;
    animation-delay: 2s;
}

.ripple-3 {
    width: 120px;
    height: 120px;
    bottom: 25%;
    left: 25%;
    animation: rippleExpand 9s ease-out infinite;
    animation-delay: 4s;
}

.ripple-4 {
    width: 180px;
    height: 180px;
    top: 35%;
    right: 15%;
    animation: rippleExpand 12s ease-out infinite;
    animation-delay: 1s;
}

.ripple-5 {
    width: 90px;
    height: 90px;
    bottom: 40%;
    right: 30%;
    animation: rippleExpand 8s ease-out infinite;
    animation-delay: 5s;
}

.ripple-6 {
    width: 140px;
    height: 140px;
    top: 10%;
    left: 50%;
    animation: rippleExpand 11s ease-out infinite;
    animation-delay: 3s;
}

@keyframes rippleExpand {
    0% {
        transform: scale(0);
        opacity: 0.8;
        border-width: 3px;
    }
    30% {
        opacity: 0.5;
    }
    60% {
        opacity: 0.2;
        border-width: 2px;
    }
    100% {
        transform: scale(5);
        opacity: 0;
        border-width: 1px;
    }
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.08) 0%, transparent 70%);
    pointer-events: none;
    animation: pulse 20s ease-in-out infinite, fadeIn 1s ease-out;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(14, 165, 233, 0.08) 0%, transparent 70%);
    pointer-events: none;
    animation: pulse 25s ease-in-out infinite reverse, fadeIn 1.2s ease-out;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1) rotate(0deg);
        opacity: 1;
    }
    50% {
        transform: scale(1.15) rotate(5deg);
        opacity: 0.8;
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.hero-content {
    max-width: 900px;
    z-index: 1;
    position: relative;
    animation: heroContentFadeIn 0.8s ease-out;
}

@keyframes heroContentFadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.hero-content::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(102, 126, 234, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    animation: float 6s ease-in-out infinite;
    pointer-events: none;
    z-index: -1;
}

.hero-content::after {
    content: '';
    position: absolute;
    top: 30%;
    right: 20%;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(14, 165, 233, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    animation: floatReverse 8s ease-in-out infinite;
    pointer-events: none;
    z-index: -1;
}

@keyframes float {
    0%, 100% {
        transform: translate(-50%, -50%) translateY(0px) scale(1);
    }
    50% {
        transform: translate(-50%, -50%) translateY(-20px) scale(1.1);
    }
}

@keyframes floatReverse {
    0%, 100% {
        transform: translate(0, 0) translateY(0px) scale(1);
    }
    50% {
        transform: translate(0, 0) translateY(15px) scale(1.05);
    }
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 2rem;
    line-height: 1.1;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    opacity: 0;
    transform: translateY(50px) scale(0.9);
    animation: heroTitleEnter 1.2s cubic-bezier(0.16, 1, 0.3, 1) 0.3s forwards;
    position: relative;
    display: inline-block;
}


@keyframes heroTitleEnter {
    0% {
        opacity: 0;
        transform: translateY(50px) scale(0.9) rotateX(20deg);
        filter: blur(10px);
    }
    60% {
        transform: translateY(-5px) scale(1.02) rotateX(0deg);
        filter: blur(2px);
    }
    100% {
        opacity: 1;
        transform: translateY(0) scale(1) rotateX(0deg);
        filter: blur(0);
    }
}


.hero-subtitle {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    color: var(--text-secondary);
    font-weight: 400;
    letter-spacing: 0.5px;
    max-width: 700px;
    margin: 0 auto;
    opacity: 0;
    transform: translateY(30px);
    animation: heroSubtitleEnter 1s cubic-bezier(0.16, 1, 0.3, 1) 0.8s forwards;
}

@keyframes heroSubtitleEnter {
    0% {
        opacity: 0;
        transform: translateY(30px);
        filter: blur(5px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
        filter: blur(0);
    }
}

.section {
    padding: 6rem 0;
    position: relative;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section-title {
    font-size: clamp(2.25rem, 5vw, 3.25rem);
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 4rem;
    text-align: center;
    position: relative;
    padding-bottom: 1.5rem;
    letter-spacing: -0.01em;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 5px;
    background: var(--gradient-primary);
    border-radius: 3px;
    box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3);
}

.intro {
    background: var(--bg-secondary);
    position: relative;
}

.intro-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.intro-text {
    font-size: clamp(1.125rem, 2.5vw, 1.375rem);
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.9;
    font-weight: 400;
}

.about-content {
    max-width: 850px;
    margin: 0 auto;
    text-align: center;
}

.about-content > p {
    font-size: clamp(1.125rem, 2.5vw, 1.25rem);
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.about-list {
    list-style: none;
    margin: 2.5rem 0;
    text-align: left;
    display: inline-block;
}

.about-list li {
    font-size: clamp(1.125rem, 2.5vw, 1.25rem);
    color: var(--text-secondary);
    margin-bottom: 1.25rem;
    padding-left: 2rem;
    position: relative;
    line-height: 1.8;
}

.about-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.6em;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--gradient-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.about-philosophy-card {
    margin-top: 3rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.about-philosophy {
    font-size: clamp(1.25rem, 3vw, 1.5rem);
    color: var(--text-primary);
    font-weight: 500;
    line-height: 1.8;
    padding: 3rem;
    background: var(--bg-primary);
    border-radius: 20px;
    box-shadow: 0 8px 32px var(--shadow);
    border: 1px solid var(--border-color);
    text-align: center;
    position: relative;
    overflow: hidden;
    transition: var(--transition);
}

.about-philosophy:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px var(--shadow-lg);
    border-color: var(--secondary-color);
}

.about-philosophy::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
}

.about-philosophy::after {
    content: '"';
    position: absolute;
    top: 1rem;
    left: 1.5rem;
    font-size: 4rem;
    color: var(--text-secondary);
    opacity: 0.2;
    font-family: Georgia, serif;
    line-height: 1;
}

.activities-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 2.5rem;
    margin-top: 4rem;
}

.activities-grid .activity-card {
    flex: 0 1 300px;
    max-width: 100%;
}

.activity-card {
    background: var(--bg-primary);
    padding: 3rem;
    border-radius: 24px;
    box-shadow: 0 4px 24px var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.activity-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}

.activity-card:hover::before {
    transform: scaleX(1);
}

.activity-card:hover {
    transform: translateY(-12px);
    box-shadow: 0 12px 40px var(--shadow-lg);
    border-color: transparent;
}

.activity-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1.25rem;
    letter-spacing: -0.01em;
    position: relative;
    padding-left: 1.5rem;
}

.activity-title::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.5em;
    width: 4px;
    height: 1.5em;
    background: var(--gradient-primary);
    border-radius: 2px;
    transition: height 0.4s ease;
}

.activity-card:hover .activity-title::before {
    height: 2em;
}

.activity-text {
    font-size: 1.0625rem;
    color: var(--text-secondary);
    line-height: 1.8;
    font-weight: 400;
}

.approach {
    background: var(--bg-secondary);
}

.approach-content {
    max-width: 950px;
    margin: 0 auto;
    text-align: center;
}

.approach-content > p {
    font-size: clamp(1.125rem, 2.5vw, 1.25rem);
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.approach-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 2rem;
    margin: 3.5rem 0;
}

.approach-grid .approach-item {
    flex: 0 1 280px;
    max-width: 100%;
}

.approach-item {
    display: flex;
    flex-direction: column;
    padding: 2.5rem 2rem;
    background: var(--bg-primary);
    border-radius: 20px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.approach-item::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.approach-item:hover::after {
    opacity: 0.05;
}

.approach-item:hover {
    transform: translateY(-8px);
    border-color: var(--secondary-color);
    box-shadow: 0 8px 24px var(--shadow);
}

.approach-label {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
    position: relative;
    z-index: 1;
}

.approach-value {
    font-size: 1.25rem;
    color: var(--text-primary);
    font-weight: 700;
    position: relative;
    z-index: 1;
    letter-spacing: -0.01em;
}

.approach-philosophy {
    font-size: clamp(1.25rem, 3vw, 1.5rem);
    color: var(--text-primary);
    font-weight: 500;
    line-height: 1.8;
    margin-top: 3rem;
    padding: 3rem;
    background: var(--bg-primary);
    border-radius: 24px;
    box-shadow: 0 8px 32px var(--shadow);
    border: 1px solid var(--border-color);
    text-align: center;
    position: relative;
    overflow: hidden;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    transition: var(--transition);
}

.approach-philosophy:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px var(--shadow-lg);
    border-color: var(--secondary-color);
}

.approach-philosophy::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
}

.approach-philosophy::after {
    content: '"';
    position: absolute;
    top: 1rem;
    right: 1.5rem;
    font-size: 4rem;
    color: var(--text-secondary);
    opacity: 0.15;
    font-family: Georgia, serif;
    line-height: 1;
    transform: rotate(180deg);
}

.audience-content {
    max-width: 850px;
    margin: 0 auto;
    text-align: center;
}

.audience-list {
    list-style: none;
    margin: 2.5rem 0;
    text-align: left;
    display: inline-block;
}

.audience-list li {
    font-size: clamp(1.125rem, 2.5vw, 1.25rem);
    color: var(--text-secondary);
    margin-bottom: 1.25rem;
    padding-left: 2.5rem;
    position: relative;
    line-height: 1.8;
}

.audience-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    top: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    color: white;
    border-radius: 6px;
    font-size: 0.875rem;
    font-weight: bold;
    box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3);
}

.audience-note {
    font-size: clamp(1.125rem, 2.5vw, 1.25rem);
    color: var(--text-primary);
    margin-top: 3rem;
    font-weight: 500;
    padding: 1.5rem 2rem;
    background: var(--bg-secondary);
    border-radius: 12px;
    display: inline-block;
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.audience-note:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px var(--shadow);
    border-color: var(--secondary-color);
    background: var(--bg-primary);
}

.istanbul {
    background: var(--bg-secondary);
}

.istanbul-content {
    max-width: 850px;
    margin: 0 auto;
    text-align: center;
}

.istanbul-content p {
    font-size: clamp(1.125rem, 2.5vw, 1.375rem);
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.9;
    font-weight: 400;
}

.members-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 2.5rem;
    margin-top: 4rem;
}

.members-grid .member-card {
    flex: 0 1 280px;
    max-width: 100%;
}

.member-card {
    background: var(--bg-primary);
    border-radius: 24px;
    overflow: hidden;
    box-shadow: 0 4px 24px var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border-color);
    text-align: center;
    position: relative;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.member-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity 0.4s ease;
    z-index: 1;
    pointer-events: none;
}

.member-card:hover::before {
    opacity: 0.03;
}

.member-card:hover {
    transform: translateY(-12px);
    box-shadow: 0 12px 40px var(--shadow-lg);
    border-color: transparent;
}

.member-image-wrapper {
    width: 100%;
    padding-top: 100%;
    position: relative;
    overflow: hidden;
    background: var(--bg-tertiary);
    flex-shrink: 0;
}

.member-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
    filter: grayscale(0.2);
}

.member-card:hover .member-image {
    transform: scale(1.08);
    filter: grayscale(0);
}

.member-name {
    font-size: 1.125rem;
    font-weight: 600;
    color: white;
    padding: 1.25rem 1.5rem;
    margin: 0;
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 2;
    letter-spacing: -0.01em;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
}

.member-name::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    top: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.7) 0%, rgba(0, 0, 0, 0.3) 100%);
    backdrop-filter: blur(15px) saturate(180%);
    -webkit-backdrop-filter: blur(15px) saturate(180%);
    z-index: -1;
}

.cta {
    background: var(--gradient-primary);
    color: white;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    animation: pulse 15s ease-in-out infinite;
}

.cta-content {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.cta-title {
    font-size: clamp(2.25rem, 5vw, 3.5rem);
    font-weight: 800;
    margin-bottom: 2rem;
    color: white;
    letter-spacing: -0.02em;
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.2);
}

.cta-text {
    font-size: clamp(1.125rem, 2.5vw, 1.375rem);
    margin-bottom: 1.5rem;
    line-height: 1.9;
    color: rgba(255, 255, 255, 0.95);
    font-weight: 400;
}

.footer {
    background: var(--bg-secondary);
    text-align: center;
    padding: 4rem 0;
    border-top: 1px solid var(--border-color);
}

.footer-title {
    font-size: clamp(1.75rem, 4vw, 2.25rem);
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 1rem;
    letter-spacing: -0.01em;
}

.footer-tagline {
    font-size: clamp(1.125rem, 2.5vw, 1.5rem);
    color: var(--text-secondary);
    font-weight: 400;
    letter-spacing: 3px;
    text-transform: uppercase;
    font-size: 0.875rem;
}

.fade-in {
    animation: fadeIn 1s ease-out;
}

.fade-in-delay {
    animation: fadeIn 1s ease-out 0.3s both;
}

.slide-up {
    animation: slideUp 0.8s ease-out;
}

.slide-up-delay {
    animation: slideUp 0.8s ease-out 0.2s both;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

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

@media (max-width: 768px) {
    .nav-container {
        padding: 0 1.5rem;
        position: relative;
    }

    .burger-menu {
        display: flex;
    }

    .nav-links {
        flex-direction: column;
        width: 100%;
        gap: 0;
        margin: 0;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease, opacity 0.3s ease;
        opacity: 0;
        padding: 0;
    }

    .nav-links.active {
        max-height: 500px;
        opacity: 1;
        padding: 1.5rem 0 0 0;
    }

    .nav-links li {
        width: 100%;
        text-align: center;
        padding: 0;
    }

    .nav-link {
        font-size: 1rem;
        padding: 1rem 2rem;
        display: block;
        width: 100%;
        border-top: 1px solid var(--border-color);
        border-radius: 0;
        margin: 0;
    }

    .nav-link:first-child {
        border-top: none;
    }

    .nav-link:last-child {
        border-bottom: none;
    }

    .nav-link::after {
        display: none;
    }

    .nav-link:hover {
        background: rgba(37, 99, 235, 0.1);
        color: var(--text-primary);
        border-radius: 12px;
        margin: 0.25rem 0.5rem;
        width: calc(100% - 1rem);
    }

    [data-theme="dark"] .nav-link:hover {
        background: rgba(96, 165, 250, 0.15);
    }

    .hero {
        padding: 7rem 1.5rem 4rem;
    }

    .section {
        padding: 4rem 0;
    }

    .container {
        padding: 0 1.5rem;
    }

    .activities-grid .activity-card {
        flex: 0 1 100%;
    }

    .approach-grid .approach-item {
        flex: 0 1 100%;
    }

    .members-grid .member-card {
        flex: 0 1 100%;
    }

    .activity-card {
        padding: 2.5rem;
    }

    .about-philosophy {
        padding: 2rem 1.5rem;
    }

    .about-philosophy::after {
        font-size: 3rem;
        top: 0.5rem;
        left: 1rem;
    }

    .approach-philosophy {
        padding: 2rem 1.5rem;
    }

    .approach-philosophy::after {
        font-size: 3rem;
        top: 0.5rem;
        right: 1rem;
    }
}

@media (max-width: 480px) {
    .members-grid .member-card {
        flex: 0 1 100%;
    }

    .logo-text {
        font-size: 1.5rem;
        letter-spacing: 2px;
    }

    .nav-link {
        font-size: 0.95rem;
        padding: 0.875rem 1.5rem;
    }

    .activity-card {
        padding: 2rem;
    }

    .section-title {
        margin-bottom: 3rem;
    }
}