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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: #0f1419;
    color: #e0e0e0;
}

header {
    padding: 24px 40px;
    background: #1a1a2e;
    border-bottom: 1px solid #2a2a3e;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo {
    font-size: 20px;
    font-weight: 700;
    color: #00a8e8;
    display: flex;
    align-items: center;
    gap: 4px;
}

.logo-icon {
    width: 32px;
    height: 32px;
    border-radius: 0px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo-icon img {
    width: 100%;
    height: 100%;
    border-radius: 0px;
    object-fit: contain;
}

nav a {
    color: #b0c4de;
    text-decoration: none;
    font-size: 14px;
    margin-left: 32px;
    transition: color 0.2s;
}

nav a:hover {
    color: #00a8e8;
}

.hero {
    max-width: 1200px;
    margin: 80px auto;
    padding: 0 40px;
    text-align: center;
}

.hero-badge {
    display: inline-block;
    padding: 8px 16px;
    background: rgba(0, 168, 232, 0.15);
    color: #00a8e8;
    font-size: 13px;
    font-weight: 600;
    border-radius: 20px;
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border: 1px solid rgba(0, 168, 232, 0.3);
}

h1 {
    font-size: 56px;
    line-height: 1.2;
    margin-bottom: 20px;
    color: #f5f5f5;
    font-weight: 700;
}

.highlight {
    background: linear-gradient(120deg, #00a8e8, #0099ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 20px;
    color: #b0c4de;
    line-height: 1.6;
    max-width: 800px;
    margin: 20px auto 30px;
}

.hero-flow {
    font-size: 18px;
    color: #00a8e8;
    font-weight: 600;
    margin: 20px auto 15px;
    max-width: 800px;
}

.notebooklm-comparison {
    background: rgba(0, 168, 232, 0.08);
    border: 1px solid rgba(0, 168, 232, 0.2);
    border-radius: 12px;
    padding: 30px;
    margin: 40px auto 50px;
    max-width: 900px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    text-align: left;
}

.comparison-item {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.comparison-label {
    font-size: 13px;
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 0.5px;
    color: #00a8e8;
}

.comparison-title {
    font-size: 20px;
    font-weight: 700;
    color: #f5f5f5;
    margin-bottom: 8px;
}

.comparison-desc {
    font-size: 14px;
    color: #b0c4de;
    line-height: 1.6;
}

.comparison-arrow {
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    color: #00a8e8;
}

.how-it-works {
    max-width: 1200px;
    margin: 100px auto;
    padding: 0 40px;
}

.workflow-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin: 60px 0;
    align-items: start;
}

.workflow-step {
    text-align: center;
}

.step-number {
    width: 48px;
    height: 48px;
    background: #00a8e8;
    color: #0f1419;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 700;
    margin: 0 auto 16px;
}

.step-title {
    font-size: 18px;
    font-weight: 700;
    color: #f5f5f5;
    margin-bottom: 8px;
}

.workflow-step p {
    font-size: 14px;
    color: #b0c4de;
    line-height: 1.6;
}

.example-box {
    background: rgba(0, 168, 232, 0.08);
    border: 1px solid rgba(0, 168, 232, 0.2);
    border-radius: 12px;
    padding: 24px;
    margin-top: 50px;
    font-size: 15px;
    color: #b0c4de;
    line-height: 1.8;
}

.example-box strong {
    color: #00a8e8;
}

.osint-section {
    max-width: 1200px;
    margin: 100px auto;
    padding: 0 40px;
}

.section-subtitle {
    font-size: 18px;
    color: #b0c4de;
    text-align: center;
    margin-bottom: 50px;
}

.osint-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.osint-card {
    background: rgba(0, 168, 232, 0.08);
    border: 1px solid rgba(0, 168, 232, 0.2);
    border-radius: 12px;
    padding: 30px;
    text-align: center;
}

.osint-icon {
    font-size: 40px;
    margin-bottom: 16px;
}

.osint-title {
    font-size: 18px;
    font-weight: 700;
    color: #f5f5f5;
    margin-bottom: 12px;
}

.osint-desc {
    font-size: 14px;
    color: #b0c4de;
    line-height: 1.6;
}

.stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    margin: 60px 0;
    padding: 60px 0;
    border-top: 1px solid #2a2a3e;
    border-bottom: 1px solid #2a2a3e;
}

.stat {
    text-align: center;
}

.stat-number {
    font-size: 42px;
    font-weight: 700;
    color: #00a8e8;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 14px;
    color: #b0c4de;
}

.features-section {
    max-width: 1200px;
    margin: 100px auto;
    padding: 0 40px;
}

.section-title {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 50px;
    text-align: center;
    color: #f5f5f5;
}

.freemium-banner {
    background: rgba(0, 168, 232, 0.1);
    padding: 30px;
    border-radius: 8px;
    margin-bottom: 50px;
    border: 1px solid rgba(0, 168, 232, 0.2);
    border-left: 4px solid #00a8e8;
}

.freemium-banner strong {
    color: #00a8e8;
    font-size: 14px;
}

.freemium-banner p {
    margin-top: 8px;
    color: #b0c4de;
    font-size: 14px;
    line-height: 1.6;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
    margin-bottom: 60px;
}

.feature-card {
    padding: 40px;
    background: #1a1a2e;
    border: 1px solid #2a2a3e;
    border-radius: 8px;
    transition: all 0.3s;
}

.feature-card:hover {
    border-color: #00a8e8;
    box-shadow: 0 4px 20px rgba(0, 168, 232, 0.15);
    background: #16213e;
}

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

.feature-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 12px;
    color: #f5f5f5;
}

.feature-desc {
    font-size: 14px;
    color: #b0c4de;
    line-height: 1.6;
}

.coming-soon-badge {
    display: inline-block;
    margin-top: 8px;
    padding: 4px 12px;
    background: rgba(255, 165, 0, 0.15);
    color: #ffa500;
    font-size: 11px;
    font-weight: 600;
    border-radius: 12px;
    border: 1px solid rgba(255, 165, 0, 0.3);
}

.comparison {
    max-width: 1200px;
    margin: 80px auto;
    padding: 0 40px;
}

.comparison-table {
    overflow-x: auto;
    border: 1px solid #2a2a3e;
    border-radius: 8px;
}

table {
    width: 100%;
    border-collapse: collapse;
    background: #1a1a2e;
}

th {
    background: #16213e;
    padding: 20px;
    text-align: left;
    font-weight: 600;
    color: #f5f5f5;
    border-bottom: 2px solid #2a2a3e;
}

td {
    padding: 20px;
    border-bottom: 1px solid #2a2a3e;
    color: #b0c4de;
}

tr:last-child td {
    border-bottom: none;
}

.check {
    color: #00a8e8;
    font-weight: 600;
}

.cross {
    color: #666;
}

.cta-container {
    max-width: 800px;
    margin: 100px auto 80px;
    padding: 0 40px;
}

.cta-box {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    border: 1px solid #2a2a3e;
    border-radius: 12px;
    padding: 60px;
    text-align: center;
}

.cta-title {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 16px;
    color: #f5f5f5;
}

.cta-subtitle {
    font-size: 16px;
    color: #b0c4de;
    margin-bottom: 32px;
    line-height: 1.6;
}

.email-form {
    display: flex;
    gap: 12px;
    max-width: 500px;
    margin: 0 auto 16px;
}

.email-form input {
    flex: 1;
    padding: 16px 20px;
    background: #0f1419;
    border: 1px solid #2a2a3e;
    border-radius: 8px;
    color: #e0e0e0;
    font-size: 15px;
}

.email-form input:focus {
    outline: none;
    border-color: #00a8e8;
}

.email-form button {
    padding: 16px 32px;
    background: #00a8e8;
    color: #fff;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    font-size: 15px;
    cursor: pointer;
    transition: background 0.2s;
}

.email-form button:hover {
    background: #0099dd;
}

.email-form button:disabled {
    background: #666;
    cursor: not-allowed;
}

.form-note {
    font-size: 12px;
    color: #7a7a8e;
    margin-top: 8px;
}

.success-message {
    display: none;
    padding: 16px;
    background: rgba(0, 200, 100, 0.15);
    border: 1px solid rgba(0, 200, 100, 0.3);
    border-radius: 8px;
    color: #00c864;
    font-weight: 600;
}

.error-message {
    display: none;
    padding: 16px;
    background: rgba(255, 69, 58, 0.15);
    border: 1px solid rgba(255, 69, 58, 0.3);
    border-radius: 8px;
    color: #ff453a;
    font-weight: 600;
    margin-top: 16px;
}

footer {
    text-align: center;
    padding: 60px 40px;
    color: #7a7a8e;
    font-size: 14px;
    border-top: 1px solid #2a2a3e;
}

footer a {
    color: #00a8e8;
    text-decoration: none;
}

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

.footnote {
    margin-top: 24px;
    font-size: 12px;
    color: #666;
    line-height: 1.6;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* Screen reader only class for accessibility */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

@media (max-width: 768px) {
    header {
        padding: 16px 20px;
        flex-wrap: wrap;
    }

    nav {
        width: 100%;
        margin-top: 16px;
        display: flex;
        justify-content: center;
        flex-wrap: wrap;
        gap: 12px;
    }

    nav a {
        margin-left: 0;
        padding: 8px 16px;
        background: rgba(0, 168, 232, 0.1);
        border-radius: 6px;
    }

    .hero {
        margin: 40px auto;
        padding: 0 20px;
    }

    h1 {
        font-size: 32px;
        line-height: 1.3;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .hero-flow {
        font-size: 16px;
    }

    .hero-badge {
        font-size: 11px;
        padding: 6px 12px;
    }

    .notebooklm-comparison {
        grid-template-columns: 1fr;
        gap: 20px;
        padding: 20px;
        margin: 30px auto 40px;
    }

    .comparison-arrow {
        display: none;
    }

    .workflow-steps {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .stats {
        grid-template-columns: 1fr;
        gap: 24px;
        padding: 40px 0;
    }

    .stat-number {
        font-size: 36px;
    }

    .features-section,
    .how-it-works,
    .osint-section {
        margin: 60px auto;
        padding: 0 20px;
    }

    .section-title {
        font-size: 26px;
        margin-bottom: 30px;
    }

    .freemium-banner {
        padding: 20px;
    }

    .features-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .feature-card {
        padding: 24px;
    }

    .osint-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .example-box {
        padding: 16px;
        font-size: 14px;
    }

    .cta-container {
        margin: 60px auto;
        padding: 0 20px;
    }

    .cta-box {
        padding: 32px 20px;
    }

    .cta-title {
        font-size: 26px;
    }

    .cta-subtitle {
        font-size: 15px;
    }

    .email-form {
        flex-direction: column;
    }

    .email-form input,
    .email-form button {
        width: 100%;
    }

    footer {
        padding: 40px 20px;
    }

    .footnote {
        font-size: 11px;
    }

    table {
        font-size: 12px;
    }

    th, td {
        padding: 12px 8px;
    }
}

/* Extra small devices (portrait phones) */
@media (max-width: 480px) {
    h1 {
        font-size: 28px;
    }

    .logo {
        font-size: 18px;
    }

    .stat-number {
        font-size: 32px;
    }

    .section-title {
        font-size: 24px;
    }

    .cta-title {
        font-size: 24px;
    }

    .feature-icon,
    .osint-icon {
        font-size: 28px;
    }

    .step-number {
        width: 40px;
        height: 40px;
        font-size: 20px;
    }
}