:root {
    --primary-color: #000000;
    --accent-color: #28cd41; /* iOS Green */
    --accent-blue: #007aff; /* iOS Blue */
    --accent-red: #ff3b30; /* iOS Red */
    --accent-yellow: #ffcc00; /* iOS Yellow */
    --bg-color: #f5f5f7; /* Apple light gray */
    --text-color: #1d1d1f;
    --secondary-text: #86868b;
    --card-bg: #ffffff;
    --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

body {
    font-family: var(--font-stack);
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

/* Navbar */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 40px;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 100;
    border-bottom: 1px solid rgba(0,0,0,0.05);
}

.logo {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-color);
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo i {
    color: var(--accent-red);
}

.nav-download {
    background: var(--primary-color);
    color: white;
    padding: 8px 20px;
    border-radius: 20px;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: transform 0.2s;
}

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

/* Hero Section */
.hero-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding-top: 80px; /* navbar height */
    background: radial-gradient(circle at 50% 0%, #eef2f3 0%, #ffffff 100%);
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 60px;
    flex-wrap: wrap;
}

.hero-text {
    flex: 1;
    min-width: 300px;
}

h1 {
    font-size: 3.5rem;
    line-height: 1.1;
    letter-spacing: -0.02em;
    margin-bottom: 24px;
    font-weight: 700;
    background: linear-gradient(135deg, #1d1d1f 0%, #434344 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    font-size: 1.3rem;
    color: var(--secondary-text);
    margin-bottom: 32px;
    max-width: 500px;
    font-weight: 400;
}

.app-store-badge img {
    height: 60px;
    transition: opacity 0.2s;
}

.app-store-badge img:hover {
    opacity: 0.8;
}

.trust-indicators {
    margin-top: 40px;
    display: flex;
    gap: 24px;
}

.trust-item {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--secondary-text);
    font-size: 0.9rem;
    font-weight: 500;
}

.trust-item i {
    color: var(--accent-color);
}

/* Phone Mockup */
.phone-mockup {
    width: 300px;
    height: 600px;
    background: #000;
    border-radius: 40px;
    padding: 12px;
    box-shadow: 0 50px 100px -20px rgba(0,0,0,0.2);
    position: relative;
    border: 4px solid #333;
}

.notch {
    width: 120px;
    height: 24px;
    background: #000;
    position: absolute;
    top: 12px;
    left: 50%;
    transform: translateX(-50%);
    border-bottom-left-radius: 12px;
    border-bottom-right-radius: 12px;
    z-index: 10;
}

.screen {
    width: 100%;
    height: 100%;
    background: #fff;
    border-radius: 32px;
    overflow: hidden;
    position: relative;
    display: flex;
    flex-direction: column;
}

/* App UI Inside Mockup */
.status-bar {
    height: 44px;
    display: flex;
    justify-content: space-between;
    padding: 0 20px;
    align-items: center;
    font-size: 12px;
    font-weight: 600;
    padding-top: 10px;
}

.status-icons {
    display: flex;
    gap: 4px;
}

.app-header {
    padding: 10px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.app-header h2 {
    font-size: 28px;
    font-weight: 800;
    margin: 0;
}

.avatar-circle {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    overflow: hidden;
    background: #eee;
}

.avatar-circle img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.app-content {
    flex: 1;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    background: #f9f9f9;
}

/* Status Card */
.status-card {
    background: #fff;
    border-radius: 20px;
    padding: 20px;
    text-align: center;
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
    border: 1px solid rgba(0,0,0,0.05);
}

.status-card.warning {
    border: 1px solid rgba(255, 204, 0, 0.3);
}

.icon-circle {
    width: 60px;
    height: 60px;
    background: rgba(255, 204, 0, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 12px;
}

.icon-circle i {
    font-size: 24px;
    color: #ffcc00; /* Darker yellow for text/icon */
}

.status-card h3 {
    font-size: 18px;
    margin-bottom: 4px;
}

.warning-text {
    font-size: 13px;
    color: #ff9500;
    margin-bottom: 16px;
}

.alert-timer {
    background: rgba(255, 204, 0, 0.1);
    color: #eebb00;
    padding: 8px;
    border-radius: 8px;
    font-size: 12px;
    font-weight: 500;
}

/* Location Pill */
.location-pill {
    background: rgba(0, 122, 255, 0.1);
    color: var(--accent-blue);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    align-self: center;
}

/* Check In Button */
.check-in-btn {
    margin-top: auto;
    background: linear-gradient(to right, #28cd41, #34c759);
    color: white;
    border: none;
    padding: 16px;
    border-radius: 16px;
    font-size: 18px;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    box-shadow: 0 8px 20px rgba(40, 205, 65, 0.3);
    cursor: pointer;
}

.tab-bar {
    height: 80px;
    background: #fff;
    border-top: 1px solid #eee;
    display: flex;
    justify-content: space-around;
    padding-top: 10px;
}

.tab-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    color: #999;
    font-size: 10px;
}

.tab-item.active {
    color: var(--accent-color);
}

.tab-item i {
    font-size: 20px;
}


/* Features Section */
.features {
    max-width: 1000px;
    margin: 0 auto;
    padding: 80px 20px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
}

.feature-card {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 24px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.04);
    transition: transform 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
}

.icon-box {
    width: 50px;
    height: 50px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    margin-bottom: 20px;
}

.icon-box.green { background: rgba(40, 205, 65, 0.1); color: var(--accent-color); }
.icon-box.red { background: rgba(255, 59, 48, 0.1); color: var(--accent-red); }
.icon-box.blue { background: rgba(0, 122, 255, 0.1); color: var(--accent-blue); }

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 10px;
    font-weight: 600;
}

.feature-card p {
    color: var(--secondary-text);
    font-size: 0.95rem;
}

/* Footer */
footer {
    text-align: center;
    padding: 60px 20px;
    background: #fff;
    border-top: 1px solid #eee;
    color: var(--secondary-text);
    font-size: 0.9rem;
}

.footer-links {
    margin-top: 20px;
    display: flex;
    justify-content: center;
    gap: 20px;
}

.footer-links a {
    color: var(--secondary-text);
    text-decoration: none;
}

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

/* Responsive */
@media (max-width: 768px) {
    .hero-content {
        flex-direction: column;
        text-align: center;
        gap: 40px;
    }

    h1 {
        font-size: 2.5rem;
    }
    
    .subtitle {
        margin: 0 auto 32px;
    }

    .trust-indicators {
        justify-content: center;
    }

    .phone-mockup {
        width: 280px;
        height: 560px;
    }
}