:root {
    --primary-blue: #007AFF;
    --primary-orange: #FF9500;
    --bg-color: #F5F5F7;
    --text-color: #1D1D1F;
    --dark-bg: #000000;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.5;
}

.container {
    max-width: 980px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Nav */
.top-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 0;
}

.nav-logo {
    font-weight: 700;
    font-size: 18px;
    color: #1D1D1F;
}

.nav-links a {
    color: #1D1D1F;
    text-decoration: none;
    margin-left: 24px;
    font-size: 14px;
    font-weight: 500;
}

.nav-links a:hover {
    color: var(--primary-blue);
}

/* Header/Hero */
header {
    text-align: center;
    padding: 80px 0 40px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.app-icon {
    width: 120px;
    height: 120px;
    border-radius: 26px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
    margin-bottom: 24px;
    object-fit: cover;
}

h1 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 8px;
}

.subtitle {
    font-size: 24px;
    color: #86868b;
    font-weight: 400;
    margin-bottom: 32px;
}

.download-btn {
    display: inline-block;
    background: #000;
    color: #fff;
    padding: 12px 24px;
    border-radius: 40px;
    text-decoration: none;
    font-weight: 600;
    transition: transform 0.2s ease;
}

.download-btn:hover {
    transform: scale(1.05);
}

/* Features */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    padding: 60px 0;
}

.feature-card {
    background: #fff;
    padding: 32px;
    border-radius: 18px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    text-align: center;
}

.feature-icon {
    font-size: 32px;
    margin-bottom: 16px;
    display: block;
}

.feature-card h3 {
    margin-bottom: 8px;
    font-size: 20px;
}

.feature-card p {
    color: #86868b;
    font-size: 15px;
}

/* Footer */
footer {
    text-align: center;
    padding: 40px 0;
    border-top: 1px solid #d2d2d7;
    margin-top: 40px;
    font-size: 12px;
    color: #86868b;
}

footer a {
    color: #515154;
    text-decoration: none;
    margin: 0 8px;
}

footer a:hover {
    text-decoration: underline;
}

/* Privacy Page Specific */
.privacy-content {
    background: #fff;
    padding: 40px;
    border-radius: 18px;
    margin: 40px 0;
}

.privacy-content h2 {
    margin-top: 24px;
    margin-bottom: 12px;
    font-size: 20px;
}

.privacy-content p {
    margin-bottom: 16px;
    color: #333;
}

@media (max-width: 768px) {
    h1 {
        font-size: 36px;
    }

    .subtitle {
        font-size: 20px;
    }
}

/* Support Form */
.support-content {
    background: #fff;
    padding: 40px;
    border-radius: 18px;
    margin: 40px 0;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.support-content h1 {
    font-size: 32px;
    margin-bottom: 12px;
}

.support-content p {
    color: #86868b;
    margin-bottom: 32px;
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #1D1D1F;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #d2d2d7;
    border-radius: 12px;
    font-size: 16px;
    transition: border-color 0.2s;
}

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

.submit-btn {
    background: var(--primary-blue);
    color: #fff;
    border: none;
    padding: 14px 32px;
    border-radius: 40px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: opacity 0.2s;
}

.submit-btn:hover {
    opacity: 0.9;
}

.error-message {
    background: #fff2f2;
    color: #ff3b30;
    padding: 16px;
    border-radius: 12px;
    margin-bottom: 24px;
}

.success-message {
    background: #f2fff4;
    color: #34c759;
    padding: 32px;
    border-radius: 12px;
    text-align: center;
}