:root {
    --blue-50: #eef4fb;
    --blue-100: #d4e6f6;
    --blue-200: #a9ccee;
    --blue-300: #7eb3e6;
    --blue-400: #5499de;
    --blue-500: #3a7fc9;
    --blue-600: #2d66a8;
    --blue-700: #234f85;
    --blue-800: #1a3a63;

    --orange-50: #fef6ee;
    --orange-100: #fce5cc;
    --orange-200: #f9cb99;
    --orange-300: #f5b166;
    --orange-400: #f09733;
    --orange-500: #e07b10;
    --orange-600: #b8620c;
    --orange-700: #8f4c09;

    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--blue-50);
    color: var(--gray-800);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--gray-200);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: var(--blue-700);
}

.logo-icon {
    height: 32px;
    width: auto;
    vertical-align: middle;
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--blue-700);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 0.5rem;
}

.nav-link {
    text-decoration: none;
    color: var(--gray-600);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.2s ease;
}

.nav-link:hover {
    color: var(--blue-600);
    background: var(--blue-50);
}

.nav-link.active {
    color: var(--blue-700);
    background: var(--blue-100);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--gray-700);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.hero {
    position: relative;
    background: linear-gradient(135deg, var(--blue-200) 0%, var(--blue-100) 50%, var(--orange-50) 100%);
    padding: 5rem 1.5rem;
    text-align: center;
    overflow: hidden;
}

.hero-logo {
    width: 20%;
    max-width: 150px;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 700px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 2rem;
}

.hero-text {
    flex: 1;
}

.hero-title {
    font-size: clamp(2rem, 5vw, 3.25rem);
    font-weight: 800;
    color: var(--blue-800);
    line-height: 1.2;
    margin-bottom: 1rem;
}

.highlight {
    background: linear-gradient(135deg, var(--orange-400), var(--orange-500));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(1rem, 2.5vw, 1.25rem);
    color: var(--gray-600);
    font-weight: 400;
    max-width: 500px;
    margin: 0 auto;
}

.hero-decoration {
    position: absolute;
    inset: 0;
    z-index: 1;
    pointer-events: none;
}

.circle {
    position: absolute;
    border-radius: 50%;
    opacity: 0.15;
}

.circle-1 {
    width: 300px;
    height: 300px;
    background: var(--orange-300);
    top: -80px;
    right: -60px;
}

.circle-2 {
    width: 200px;
    height: 200px;
    background: var(--blue-400);
    bottom: -50px;
    left: -40px;
}

.circle-3 {
    width: 120px;
    height: 120px;
    background: var(--orange-400);
    bottom: 20%;
    right: 15%;
}

.cards-section {
    flex: 1;
    padding: 3rem 1.5rem 4rem;
}

.cards-container {
    max-width: 1000px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.card {
    display: flex;
    flex-direction: column;
    background: white;
    border-radius: var(--radius-lg);
    padding: 2.5rem 2rem;
    text-decoration: none;
    color: inherit;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--gray-200);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    transition: height 0.3s ease;
}

.card-info::before {
    background: linear-gradient(90deg, var(--blue-400), var(--blue-300));
}

.card-exercises::before {
    background: linear-gradient(90deg, var(--orange-400), var(--orange-300));
}

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

.card:hover::before {
    height: 6px;
}

.card-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.card-info .card-icon {
    background: var(--blue-50);
    color: var(--blue-500);
}

.card-exercises .card-icon {
    background: var(--orange-50);
    color: var(--orange-500);
}

.card-icon svg {
    width: 28px;
    height: 28px;
}

.card-title {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: 0.75rem;
}

.card-text {
    font-size: 0.95rem;
    color: var(--gray-500);
    line-height: 1.6;
    flex: 1;
    margin-bottom: 1.5rem;
}

.card-cta {
    font-size: 0.9rem;
    font-weight: 600;
}

.card-info .card-cta {
    color: var(--blue-500);
}

.card-exercises .card-cta {
    color: var(--orange-500);
}

.footer {
    background: white;
    border-top: 1px solid var(--gray-200);
    padding: 1.5rem;
    text-align: center;
}

.footer-content p {
    font-size: 0.85rem;
    color: var(--gray-400);
}

.page-content {
    flex: 1;
    max-width: 900px;
    margin: 0 auto;
    padding: 3rem 1.5rem 4rem;
    width: 100%;
}

.page-header {
    margin-bottom: 2.5rem;
}

.page-header h1 {
    font-size: clamp(1.75rem, 4vw, 2.25rem);
    font-weight: 800;
    color: var(--blue-800);
    margin-bottom: 0.5rem;
}

.page-header p {
    font-size: 1.05rem;
    color: var(--gray-500);
}

.content-section {
    background: white;
    border-radius: var(--radius-lg);
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-200);
}

.content-section h2 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--blue-700);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.content-section h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 0.5rem;
}

.content-section p {
    color: var(--gray-600);
    margin-bottom: 1rem;
    line-height: 1.7;
}

.content-section p:last-child {
    margin-bottom: 0;
}

.feature-list {
    list-style: none;
    display: grid;
    gap: 0.75rem;
}

.feature-list li {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    color: var(--gray-600);
}

.feature-list li::before {
    content: '';
    width: 8px;
    height: 8px;
    border-radius: 50%;
    margin-top: 0.5rem;
    flex-shrink: 0;
}

.feature-list.blue li::before {
    background: var(--blue-400);
}

.feature-list.orange li::before {
    background: var(--orange-400);
}

.exercise-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.25rem;
}

.exercise-card {
    background: white;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    transition: all 0.2s ease;
    cursor: pointer;
}

.exercise-card:hover {
    border-color: var(--blue-200);
    box-shadow: var(--shadow-md);
}

.exercise-card .tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.25rem 0.75rem;
    border-radius: 999px;
    margin-bottom: 0.75rem;
}

.tag.blue {
    background: var(--blue-50);
    color: var(--blue-600);
}

.tag.orange {
    background: var(--orange-50);
    color: var(--orange-600);
}

.tag.green {
    background: #ecfdf5;
    color: #059669;
}

.exercise-card h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: 0.5rem;
}

.exercise-card p {
    font-size: 0.85rem;
    color: var(--gray-500);
    line-height: 1.5;
}

.exercise-card .meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-top: 1rem;
    font-size: 0.8rem;
    color: var(--gray-400);
}

.section-badge {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.25rem 0.75rem;
    border-radius: 999px;
    margin-bottom: 1rem;
}

.section-badge.blue {
    background: var(--blue-50);
    color: var(--blue-600);
}

.section-badge.orange {
    background: var(--orange-50);
    color: var(--orange-600);
}

.filter-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.filter-btn {
    padding: 0.5rem 1rem;
    border-radius: 999px;
    border: 1px solid var(--gray-200);
    background: white;
    color: var(--gray-600);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
}

.filter-btn:hover {
    border-color: var(--blue-300);
    color: var(--blue-600);
}

.filter-btn.active {
    background: var(--blue-500);
    color: white;
    border-color: var(--blue-500);
}

.empty-state {
    text-align: center;
    padding: 3rem;
    color: var(--gray-400);
}

.construction-banner {
    border-left: 4px solid var(--orange-400);
}

.contact-form {
    margin-top: 1rem;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 0.35rem;
}

.form-group input {
    width: 100%;
    padding: 0.65rem 0.85rem;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-family: inherit;
    color: var(--gray-800);
    background: var(--gray-50);
    transition: border-color 0.2s ease;
}

.form-group input:focus {
    outline: none;
    border-color: var(--blue-400);
    background: white;
}

.form-hint {
    font-size: 0.8rem;
    color: var(--gray-400);
    margin-bottom: 1rem;
}

.btn-submit {
    display: inline-block;
    padding: 0.7rem 1.5rem;
    background: linear-gradient(135deg, var(--blue-500), var(--blue-600));
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-submit:hover {
    background: linear-gradient(135deg, var(--blue-600), var(--blue-700));
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 1rem;
        border-bottom: 1px solid var(--gray-200);
        box-shadow: var(--shadow-lg);
    }

    .nav-menu.open {
        display: flex;
    }

    .nav-link {
        padding: 0.75rem 1rem;
    }

    .hero {
        padding: 3rem 1.5rem;
    }

    .cards-container {
        grid-template-columns: 1fr;
    }

    .card {
        padding: 2rem 1.5rem;
    }

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

@media (max-width: 480px) {
    .nav-container {
        padding: 0 1rem;
    }

    .hero {
        padding: 2.5rem 1rem;
    }

    .cards-section {
        padding: 2rem 1rem 3rem;
    }

    .page-content {
        padding: 2rem 1rem 3rem;
    }

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