:root {
    --bg-dark: #0a0a0a;
    --text-main: #ffffff;
    --text-muted: #a1a1aa;
    --primary: #3b82f6;
    /* Google Blue-ish */
    --primary-glow: rgba(59, 130, 246, 0.5);
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --font-head: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: var(--font-body);
    overflow-x: hidden;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Background Effects */
.background-glow {
    position: fixed;
    top: -20%;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--primary-glow) 0%, transparent 70%);
    z-index: -1;
    opacity: 0.6;
    filter: blur(80px);
}

/* Navigation */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2rem 5%;
    backdrop-filter: blur(10px);
}

.logo {
    font-family: var(--font-head);
    font-weight: 700;
    font-size: 1.5rem;
    letter-spacing: -0.02em;
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav-logo-wrapper {
    height: 40px;
    width: 40px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
}

.nav-logo {
    height: 160%;
    /* Zooms in to crop the AI-generated black padding */
    width: auto;
    transition: transform 0.3s ease;
}

.nav-logo-wrapper:hover .nav-logo {
    transform: scale(1.1);
}

.highlight {
    color: var(--primary);
}

.btn-text {
    color: var(--text-muted);
    text-decoration: none;
    margin-left: 20px;
    font-weight: 500;
    transition: color 0.3s;
}

.btn-text:hover {
    color: var(--text-main);
}

/* Hero Section */
.hero {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 4rem 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.badge {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    color: var(--primary);
    margin-bottom: 20px;
    font-weight: 600;
}

h1 {
    font-family: var(--font-head);
    font-size: 4rem;
    line-height: 1.1;
    margin-bottom: 20px;
    letter-spacing: -0.03em;
}

.gradient-text {
    background: linear-gradient(135deg, #ffffff 0%, var(--primary) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    color: var(--text-muted);
    font-size: 1.25rem;
    line-height: 1.6;
    max-width: 600px;
    margin-bottom: 40px;
}

/* CTA */
.cta-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
    width: 100%;
    max-width: 400px;
}

form {
    display: flex;
    gap: 10px;
    width: 100%;
}

.input-glass {
    flex: 1;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    padding: 12px 20px;
    border-radius: 8px;
    color: white;
    font-family: var(--font-body);
    font-size: 1rem;
    outline: none;
    transition: border-color 0.3s;
}

.input-glass:focus {
    border-color: var(--primary);
}

.btn-primary {
    background: var(--primary);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    font-family: var(--font-body);
    transition: transform 0.2s, background 0.2s;
}

.btn-primary:hover {
    background: #2563eb;
    transform: translateY(-2px);
}

.small-text {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* Features */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    width: 100%;
    margin-top: 80px;
}

.feature-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    padding: 30px;
    border-radius: 16px;
    text-align: left;
    transition: transform 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
}

.feature-card h3 {
    font-family: var(--font-head);
    margin-bottom: 10px;
    font-size: 1.25rem;
}

.feature-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.5;
}

footer {
    padding: 2rem;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
    border-top: 1px solid var(--glass-border);
}

/* Tracker Section */
.tracker-section {
    width: 100%;
    margin-top: 100px;
    text-align: left;
    max-width: 800px;
}

.tracker-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 15px;
}

.tracker-header h2 {
    font-family: var(--font-head);
    font-size: 1.8rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.badge-mini {
    font-size: 0.7rem;
    background: var(--primary-glow);
    color: white;
    padding: 2px 8px;
    border-radius: 4px;
    text-transform: uppercase;
}

.progress-container {
    width: 200px;
    height: 8px;
    background: var(--glass-bg);
    border-radius: 4px;
    overflow: hidden;
    border: 1px solid var(--glass-border);
}

.progress-bar {
    width: 0%;
    height: 100%;
    background: var(--primary);
    transition: width 0.5s ease;
}

.tracker-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    padding: 20px;
    border-radius: 12px;
}

.problem-list {
    list-style: none;
}

.problem-item {
    padding: 12px 0;
    border-bottom: 1px solid var(--glass-border);
}

.problem-item:last-child {
    border-bottom: none;
}

/* Custom Checkbox */
.container {
    display: flex;
    align-items: center;
    position: relative;
    padding-left: 35px;
    cursor: pointer;
    font-size: 1rem;
    user-select: none;
    color: var(--text-main);
}

.container input {
    position: absolute;
    opacity: 0;
    cursor: pointer;
    height: 0;
    width: 0;
}

.checkmark {
    position: absolute;
    top: 50%;
    left: 0;
    transform: translateY(-50%);
    height: 20px;
    width: 20px;
    background-color: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 4px;
    transition: background-color 0.2s, border-color 0.2s;
}

.container:hover input~.checkmark {
    border-color: var(--primary);
}

.container input:checked~.checkmark {
    background-color: var(--primary);
    border-color: var(--primary);
}

.checkmark:after {
    content: "";
    position: absolute;
    display: none;
}

.container input:checked~.checkmark:after {
    display: block;
}

.container .checkmark:after {
    left: 7px;
    top: 3px;
    width: 5px;
    height: 10px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.container input:disabled~.checkmark {
    opacity: 0.3;
    cursor: not-allowed;
}

.container input:disabled+.checkmark+span {
    color: var(--text-muted);
}

/* Mobile Responsive */
@media (max-width: 768px) {
    h1 {
        font-size: 2.5rem;
    }

    .navbar {
        flex-direction: column;
        gap: 15px;
    }

    form {
        flex-direction: column;
    }

    .btn-primary {
        width: 100%;
    }
}