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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: #2c3e50;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 1rem;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    background: white;
    border-radius: 1rem;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    overflow: hidden;
}

/* Header */
.header {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    padding: 2rem;
    text-align: center;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.logo-icon {
    width: 60px;
    height: 60px;
    color: white;
}

.logo-text {
    font-size: 2rem;
    font-weight: 700;
    color: white;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}

/* Main content */
.main-content {
    padding: 2rem;
}

/* Hero section */
.hero-section {
    text-align: center;
    padding: 3rem 1rem;
    background: linear-gradient(to bottom, #f8f9fa, white);
    border-radius: 0.5rem;
    margin-bottom: 3rem;
}

.status-badge {
    display: inline-block;
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: white;
    padding: 0.5rem 1.5rem;
    border-radius: 2rem;
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1.5rem;
    box-shadow: 0 4px 12px rgba(245, 87, 108, 0.3);
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: #6c757d;
    max-width: 600px;
    margin: 0 auto;
}

/* About section */
.about-section {
    margin-bottom: 3rem;
}

.profile-card {
    background: white;
    border: 2px solid #e9ecef;
    border-radius: 0.5rem;
    padding: 2rem;
    text-align: center;
}

.profile-image-placeholder {
    width: 240px;
    height: 240px;
    margin: 0 auto 1.5rem;
    background: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #667eea;
    overflow: hidden;
}

.profile-image-placeholder svg {
    width: 60px;
    height: 60px;
}

.profile-image-placeholder img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
}

.section-title {
    font-size: 1.75rem;
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 1rem;
}

.instructor-description {
    font-size: 1rem;
    color: #6c757d;
    line-height: 1.8;
    max-width: 700px;
    margin: 0 auto;
}

/* Features section */
.features-section {
    margin-bottom: 3rem;
}

.features-section .section-title {
    text-align: center;
    margin-bottom: 2rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.feature-card {
    background: white;
    border: 2px solid #e9ecef;
    border-radius: 0.5rem;
    padding: 2rem;
    text-align: center;
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border-color: #4facfe;
}

.feature-icon {
    width: 50px;
    height: 50px;
    margin: 0 auto 1rem;
    color: #4facfe;
}

.feature-icon svg {
    width: 100%;
    height: 100%;
}

.feature-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 0.5rem;
}

.feature-description {
    font-size: 0.9375rem;
    color: #6c757d;
    line-height: 1.6;
}

/* CTA section */
.cta-section {
    margin-bottom: 2rem;
}

.cta-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 0.5rem;
    padding: 3rem 2rem;
    text-align: center;
    color: white;
}

.cta-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.cta-description {
    font-size: 1.125rem;
    margin-bottom: 2rem;
    opacity: 0.95;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.coming-soon-notice {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    background: rgba(255, 255, 255, 0.2);
    padding: 1rem 2rem;
    border-radius: 2rem;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.notice-icon {
    width: 24px;
    height: 24px;
    color: white;
}

.coming-soon-notice span {
    font-size: 1rem;
    font-weight: 500;
}

/* Notification form */
.notification-form-container {
    margin-top: 3rem;
    padding-top: 3rem;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.form-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: white;
}

.form-subtitle {
    font-size: 1rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.notification-form {
    max-width: 500px;
    margin: 0 auto;
}

.hidden {
    display: none;
}

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

.form-label {
    display: block;
    font-size: 0.9375rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: white;
}

.form-input {
    width: 100%;
    padding: 0.875rem 1rem;
    font-size: 1rem;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 0.5rem;
    background: rgba(255, 255, 255, 0.9);
    color: #2c3e50;
    transition: all 0.3s ease;
}

.form-input:focus {
    outline: none;
    border-color: white;
    background: white;
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.2);
}

.form-input::placeholder {
    color: #6c757d;
    opacity: 0.7;
}

.form-submit {
    width: 100%;
    padding: 1rem 2rem;
    font-size: 1.125rem;
    font-weight: 600;
    color: #667eea;
    background: white;
    border: none;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.form-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
}

.form-submit:active {
    transform: translateY(0);
}

.submit-icon {
    width: 20px;
    height: 20px;
}

/* Footer */
.footer {
    background: #f8f9fa;
    padding: 2rem;
    text-align: center;
    border-top: 1px solid #e9ecef;
}

.footer-text {
    color: #6c757d;
    font-size: 0.9375rem;
}

/* Mobile responsiveness */
@media (max-width: 768px) {
    body {
        padding: 0.5rem;
    }

    .container {
        border-radius: 0.5rem;
    }

    .header {
        padding: 1.5rem 1rem;
    }

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

    .logo-text {
        font-size: 1.5rem;
    }

    .main-content {
        padding: 1rem;
    }

    .hero-section {
        padding: 2rem 1rem;
        margin-bottom: 2rem;
    }

    .hero-title {
        font-size: 1.75rem;
    }

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

    .profile-card {
        padding: 1.5rem;
    }

    .profile-image-placeholder {
        width: 200px;
        height: 200px;
    }

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

    .features-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .feature-card {
        padding: 1.5rem;
    }

    .cta-card {
        padding: 2rem 1.5rem;
    }

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

    .cta-description {
        font-size: 1rem;
    }

    .coming-soon-notice {
        padding: 0.75rem 1.5rem;
        flex-wrap: wrap;
        justify-content: center;
    }

    .notification-form-container {
        margin-top: 2rem;
        padding-top: 2rem;
    }

    .form-title {
        font-size: 1.25rem;
    }

    .form-subtitle {
        font-size: 0.9375rem;
    }

    .form-input {
        padding: 0.75rem 0.875rem;
        font-size: 0.9375rem;
    }

    .form-submit {
        padding: 0.875rem 1.5rem;
        font-size: 1rem;
    }

    .footer {
        padding: 1.5rem 1rem;
    }
}

@media (max-width: 480px) {
    .logo {
        flex-direction: column;
        gap: 0.5rem;
    }

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

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

    .coming-soon-notice span {
        font-size: 0.9375rem;
    }
}

/* Tablet adjustments */
@media (min-width: 769px) and (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Print styles */
@media print {
    body {
        background: white;
        padding: 0;
    }

    .container {
        box-shadow: none;
    }

    .cta-card {
        background: #667eea;
        color: white;
    }
}

/* Confirmation page styles */
.confirmation-section {
    min-height: 60vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 0;
}

.confirmation-card {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.success-icon {
    width: 100px;
    height: 100px;
    margin: 0 auto 2rem;
    color: #10b981;
}

.success-icon svg {
    width: 100%;
    height: 100%;
}

.confirmation-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 1rem;
}

.confirmation-message {
    font-size: 1.25rem;
    color: #6c757d;
    margin-bottom: 2rem;
    line-height: 1.6;
}

.confirmation-card .profile-image-placeholder {
    margin: 2rem auto;
}

.confirmation-note {
    font-size: 1.125rem;
    color: #2c3e50;
    margin-bottom: 2rem;
    font-weight: 500;
}

.back-button {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    font-size: 1.125rem;
    font-weight: 600;
    color: white;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 0.5rem;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.back-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

.back-button:active {
    transform: translateY(0);
}

.back-icon {
    width: 20px;
    height: 20px;
}

/* Confirmation page mobile styles */
@media (max-width: 768px) {
    .confirmation-section {
        min-height: 50vh;
    }

    .success-icon {
        width: 80px;
        height: 80px;
        margin-bottom: 1.5rem;
    }

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

    .confirmation-message {
        font-size: 1.125rem;
    }

    .confirmation-note {
        font-size: 1rem;
    }

    .back-button {
        padding: 0.875rem 1.5rem;
        font-size: 1rem;
    }
}