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

:root {
    --primary-color: #7FB3D3;
    --secondary-color: #5A9BD4;
    --accent-color: #B8D4E3;
    --text-color: #2C3E50;
    --text-light: #6C757D;
    --bg-color: #FFFFFF;
    --bg-light: #F8F9FA;
    --border-color: #E0E0E0;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 4px 20px rgba(0, 0, 0, 0.12);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    background: var(--bg-color);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: all 0.3s ease;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--text-color);
    font-size: 1.25rem;
    font-weight: 600;
    transition: transform 0.3s ease;
}

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

.logo img {
    transition: transform 0.3s ease;
}

.logo:hover img {
    transform: rotate(5deg);
}

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

.nav-list a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-list a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

.nav-list a:hover::after,
.nav-list a.active::after {
    width: 100%;
}

.nav-list a:hover,
.nav-list a.active {
    color: var(--primary-color);
}

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

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-color);
    transition: all 0.3s ease;
    border-radius: 2px;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--bg-light) 0%, var(--bg-color) 100%);
    padding: 5rem 0;
    text-align: center;
    animation: fadeIn 1s ease;
}

.hero-image {
    max-width: 600px;
    width: 100%;
    height: auto;
    border-radius: 15px;
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
    object-fit: cover;
}

.hero-title {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    color: var(--text-color);
    animation: slideUp 0.8s ease;
}

.hero-text {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: 2rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    animation: slideUp 1s ease;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    animation: slideUp 1.2s ease;
}

/* Buttons */
.btn {
    padding: 12px 30px;
    border: none;
    border-radius: 30px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    transition: all 0.3s ease;
    text-align: center;
}

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

.btn-primary:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

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

.btn-secondary:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

/* Features */
.features {
    padding: 5rem 0;
    background: var(--bg-color);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--bg-light);
    padding: 2.5rem;
    border-radius: 15px;
    text-align: center;
    transition: all 0.3s ease;
    animation: fadeIn 1s ease;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.feature-icon {
    margin-bottom: 1.5rem;
    display: flex;
    justify-content: center;
}

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

.feature-card p {
    color: var(--text-light);
    line-height: 1.8;
}

/* Timer Section */
.timer-section {
    padding: 5rem 0;
    background: var(--bg-light);
    text-align: center;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--text-color);
}

.timer-container {
    max-width: 500px;
    margin: 0 auto;
    background: var(--bg-color);
    padding: 3rem;
    border-radius: 20px;
    box-shadow: var(--shadow);
}

.timer-display {
    font-size: 4rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 2rem;
    font-family: 'Courier New', monospace;
}

.timer-separator {
    margin: 0 10px;
}

.timer-controls {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* Page Header */
.page-header {
    background: linear-gradient(135deg, var(--bg-light) 0%, var(--bg-color) 100%);
    padding: 4rem 0;
    text-align: center;
}

.page-header h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.page-header p {
    font-size: 1.2rem;
    color: var(--text-light);
}

/* Exercises */
.exercises {
    padding: 4rem 0;
}

.exercise-card {
    background: var(--bg-light);
    border-radius: 15px;
    padding: 2.5rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

.exercise-card:hover {
    box-shadow: var(--shadow-hover);
}

.exercise-header h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.exercise-image {
    width: 100%;
    max-width: 500px;
    height: auto;
    border-radius: 10px;
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
    object-fit: cover;
}

.exercise-steps {
    margin-bottom: 2rem;
}

.step {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 2rem;
    opacity: 0.5;
    transition: opacity 0.3s ease;
}

.step.active {
    opacity: 1;
}

.step-number {
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    flex-shrink: 0;
}

.step-content h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.step-content p {
    color: var(--text-light);
    line-height: 1.8;
}

.exercise-start-btn {
    width: 100%;
    margin-top: 1rem;
    min-height: 50px;
    font-size: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

@media (max-width: 768px) {
    .exercise-start-btn {
        width: 100%;
        padding: 14px 20px;
        font-size: 0.95rem;
        min-height: 48px;
    }
}

@media (max-width: 480px) {
    .exercise-start-btn {
        padding: 12px 16px;
        font-size: 0.9rem;
        min-height: 44px;
    }
}

/* Benefits */
.benefits {
    padding: 4rem 0;
}

.benefits-image {
    width: 100%;
    max-width: 800px;
    height: auto;
    border-radius: 15px;
    margin: 0 auto 3rem;
    display: block;
    box-shadow: var(--shadow);
    object-fit: cover;
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.benefit-card {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 15px;
    transition: all 0.3s ease;
    border-left: 4px solid var(--primary-color);
}

.benefit-card:hover {
    transform: translateX(10px);
    box-shadow: var(--shadow-hover);
}

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

.benefit-card p {
    color: var(--text-light);
    line-height: 1.8;
}

.benefits-tips {
    padding: 4rem 0;
    background: var(--bg-light);
}

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

.tip-item {
    background: var(--bg-color);
    padding: 2rem;
    border-radius: 15px;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow);
}

.tip-item h4 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.tip-item p {
    color: var(--text-light);
    line-height: 1.8;
}

/* FAQ */
.faq {
    padding: 4rem 0;
}

.faq-list {
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    background: var(--bg-light);
    border-radius: 10px;
    margin-bottom: 1rem;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.faq-question {
    width: 100%;
    padding: 1.5rem;
    background: none;
    border: none;
    text-align: left;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-color);
    transition: background 0.3s ease;
}

.faq-question:hover {
    background: var(--accent-color);
}

.faq-icon {
    transition: transform 0.3s ease;
    flex-shrink: 0;
}

.faq-item.active .faq-icon {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    padding: 0 1.5rem;
}

.faq-item.active .faq-answer {
    max-height: 500px;
    padding: 0 1.5rem 1.5rem;
}

.faq-answer p {
    color: var(--text-light);
    line-height: 1.8;
}

/* Contact */
.contact {
    padding: 4rem 0;
}

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

.contact-info h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.contact-info > p {
    color: var(--text-light);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.contact-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.contact-item {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--shadow);
}

.contact-item h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.contact-item p {
    color: var(--text-light);
    line-height: 1.8;
}

.contact-item a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

.contact-item a:hover {
    color: var(--secondary-color);
    text-decoration: underline;
}

/* Privacy Policy */
.privacy-policy {
    padding: 4rem 0;
}

.policy-content {
    max-width: 900px;
    margin: 0 auto;
}

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

.policy-section h2 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.policy-section p {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 1rem;
}

.policy-section ul {
    margin-left: 2rem;
    margin-bottom: 1rem;
}

.policy-section li {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 0.5rem;
}

/* Contact Form */
.contact-form {
    background: var(--bg-light);
    padding: 2.5rem;
    border-radius: 15px;
    box-shadow: var(--shadow);
    margin-top: 2rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-color);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    width: auto;
    margin-top: 4px;
    cursor: pointer;
}

.checkbox-label span {
    color: var(--text-light);
    line-height: 1.6;
}

.form-message {
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    font-weight: 500;
}

.form-message.success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.form-message.error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

/* Footer */
.footer {
    background: var(--text-color);
    color: white;
    padding: 3rem 0 1rem;
    margin-top: 4rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h4 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.8;
}

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

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

.footer-section ul li a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    color: rgba(255, 255, 255, 0.8);
}

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

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

/* Responsive */
@media (max-width: 768px) {
    .nav-list {
        position: fixed;
        top: 70px;
        left: -100%;
        flex-direction: column;
        background: var(--bg-color);
        width: 100%;
        padding: 2rem;
        box-shadow: var(--shadow);
        transition: left 0.3s ease;
        gap: 1rem;
    }

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

    .mobile-menu-toggle {
        display: flex;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-text {
        font-size: 1.1rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .timer-display {
        font-size: 3rem;
    }

    .step {
        flex-direction: column;
        text-align: center;
    }

    .step-number {
        margin: 0 auto;
    }
}