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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    background-color: #ffffff;
    color: #1d1d1f;
    overflow-x: hidden;
}

/* Navigation */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: transparent;
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px 40px;
    display: flex;
    justify-content: flex-end;
    align-items: center;
}

.nav-links {
    display: flex;
    gap: 24px;
    align-items: center;
}

.nav-links > a {
    color: #1d1d1f;
    text-decoration: none;
    font-size: 14px;
    font-weight: 400;
    transition: opacity 0.3s ease;
}

.nav-links > a:hover {
    opacity: 0.6;
}

/* Dropdown */
.dropdown {
    position: relative;
}

.dropdown-toggle {
    background: none;
    border: none;
    color: #1d1d1f;
    font-size: 14px;
    font-weight: 400;
    cursor: pointer;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    transition: opacity 0.3s ease;
    padding: 0;
}

.dropdown-toggle:hover {
    opacity: 0.6;
}

.dropdown-toggle .arrow {
    font-size: 12px;
    margin-left: 6px;
    display: inline-block;
    transition: transform 0.3s ease;
    transform: rotate(90deg);
}

.dropdown.active .dropdown-toggle .arrow {
    transform: rotate(-90deg);
}

.dropdown-menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background-color: #ffffff;
    border: 1px solid #d2d2d7;
    border-radius: 12px;
    padding: 8px 0;
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s ease;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

.dropdown.active .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu a {
    display: block;
    padding: 10px 20px;
    color: #1d1d1f;
    text-decoration: none;
    font-size: 14px;
    transition: background-color 0.2s ease;
}

.dropdown-menu a:hover {
    background-color: #f5f5f7;
}

/* Hero Section */
main {
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 0 20px;
}

.hero {
    text-align: center;
    max-width: 1400px;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.gradient-title {
    font-size: clamp(80px, 20vw, 350px);
    font-weight: 700;
    letter-spacing: -0.03em;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 25%, #f093fb 50%, #4facfe 75%, #00f2fe 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 0.9;
    margin: 0;
    margin-bottom: 10vh;
}

.subtitle {
    font-size: clamp(16px, 2.5vw, 26px);
    font-weight: 300;
    color: #86868b;
    letter-spacing: -0.02em;
    margin: 0;
    margin-bottom: 10vh;
}

/* Notify Page */
.notify-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 80px 20px 40px;
}

.notify-content {
    text-align: center;
    max-width: 500px;
    width: 100%;
}

.notify-content h1 {
    font-size: clamp(40px, 8vw, 60px);
    font-weight: 600;
    letter-spacing: -0.03em;
    margin-bottom: 16px;
    color: #1d1d1f;
}

.notify-content p {
    font-size: 18px;
    color: #86868b;
    margin-bottom: 40px;
    font-weight: 300;
}

.notify-form {
    display: flex;
    flex-direction: row;
    gap: 0;
    max-width: 500px;
    margin: 0 auto;
    background-color: #ffffff;
    border: 1px solid #d2d2d7;
    border-radius: 12px;
    overflow: hidden;
}

.notify-form input {
    flex: 1;
    padding: 16px 20px;
    font-size: 16px;
    border: none;
    background-color: transparent;
    color: #1d1d1f;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
}

.notify-form input:focus {
    outline: none;
}

.notify-form input::placeholder {
    color: #86868b;
}

.notify-form button {
    padding: 16px 24px;
    font-size: clamp(13px, 1.8vw, 15px);
    font-weight: 500;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #ffffff;
    border: none;
    cursor: pointer;
    transition: opacity 0.3s ease;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    white-space: nowrap;
}

.notify-form button:hover {
    opacity: 0.9;
}

.notify-form button:active {
    opacity: 0.8;
}

.success-message {
    display: none;
    padding: 16px;
    background-color: #d1f4e0;
    color: #03543f;
    border-radius: 12px;
    font-size: 14px;
    margin-top: 16px;
}

.success-message.show {
    display: block;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-container {
        padding: 12px 20px;
    }

    .nav-links {
        gap: 16px;
    }

    .nav-links > a {
        font-size: 13px;
    }

    .dropdown-toggle {
        font-size: 13px;
    }

    main {
        padding: 0 16px;
    }

    .gradient-title {
        font-size: clamp(60px, 18vw, 200px);
        margin-bottom: 8vh;
    }

    .subtitle {
        font-size: clamp(14px, 3.5vw, 22px);
        margin-bottom: 8vh;
    }

    .notify-form {
        max-width: 90%;
    }
}

@media (max-width: 480px) {
    .nav-container {
        padding: 10px 16px;
    }

    .nav-links {
        gap: 12px;
    }

    .nav-links > a {
        font-size: 12px;
    }

    .dropdown-toggle {
        font-size: 12px;
    }

    .dropdown-toggle .arrow {
        font-size: 10px;
        margin-left: 4px;
    }

    .dropdown-menu {
        min-width: 180px;
    }

    .dropdown-menu a {
        padding: 8px 16px;
        font-size: 13px;
    }

    main {
        padding: 0 16px;
    }

    .gradient-title {
        font-size: clamp(50px, 16vw, 120px);
        margin-bottom: 6vh;
    }

    .subtitle {
        font-size: clamp(13px, 4vw, 18px);
        margin-bottom: 6vh;
    }

    .notify-form {
        max-width: 95%;
    }

    .notify-container {
        padding: 50px 16px 16px;
    }
}