.lp-container {
    width: 100%;
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 16px;
}

.section {
    padding: 64px 0;
}

.section-alt {
    background: #ffffff;
}

h1, h2, h3 {
    margin: 0 0 12px;
    line-height: 1.25;
    color: #101326;
}

.section-intro {
    max-width: 700px;
    margin-bottom: 32px;
    color: #4b5563;
}

/* Header */

.lp-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(10, 23, 55, 0.95);
    backdrop-filter: blur(8px);
    color: #ffffff;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 0;
}

.brand {
    display: flex;
    align-items: center;
    gap: 8px;
}

.brand-logo {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 8px;
    background: linear-gradient(135deg, #ec4899, #6366f1);
    color: #ffffff;
    font-weight: 700;
    font-size: 15px;
}

.brand-name {
    font-weight: 600;
    letter-spacing: 0.03em;
}

.lp-nav a {
    color: #e5e7eb;
    text-decoration: none;
    margin-left: 20px;
    font-size: 14px;
}

    .lp-nav a:hover {
        color: #ffffff;
    }

/* Buttons */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    border-radius: 999px;
    font-size: 14px;
    font-weight: 600;
    border: none;
    text-decoration: none;
    cursor: pointer;
    transition: transform 0.05s ease, box-shadow 0.05s ease, background 0.2s ease;
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, #ec4899, #6366f1);
    color: #ffffff;
    box-shadow: 0 10px 20px rgba(99, 102, 241, 0.45);
}
/* Subject-specific gradient buttons */
.btn-physics {
    background: linear-gradient(135deg, #3b82f6, #6366f1);
    color: #fff;
    box-shadow: 0 10px 20px rgba(99, 102, 241, 0.4);
}

    .btn-physics:hover {
        transform: translateY(-1px);
        box-shadow: 0 14px 26px rgba(99, 102, 241, 0.6);
    }

.btn-chemistry {
    background: linear-gradient(135deg, #f59e0b, #fbbf24);
    color: #fff;
    box-shadow: 0 10px 20px rgba(251, 191, 36, 0.45);
}

    .btn-chemistry:hover {
        transform: translateY(-1px);
        box-shadow: 0 14px 26px rgba(251, 191, 36, 0.65);
    }

.btn-mathematics {
    background: linear-gradient(135deg, #10b981, #14b8a6);
    color: #fff;
    box-shadow: 0 10px 20px rgba(20, 184, 166, 0.4);
}

    .btn-mathematics:hover {
        transform: translateY(-1px);
        box-shadow: 0 14px 26px rgba(20, 184, 166, 0.6);
    }

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 14px 26px rgba(99, 102, 241, 0.6);
}

.btn-ghost {
    background: transparent;
    color: #4b5563 !important;
    border: 1px solid #d1d5db;
}

    .btn-ghost:hover {
        background: #f3f4ff;
    }

.btn-full {
    width: 100%;
    justify-content: center;
}

.btn-small {
    padding: 8px 16px;
    font-size: 13px;
}

/* Hero */

.hero {
    padding: 72px 0 56px;
    background: radial-gradient(circle at top left, #e0f2fe 0, transparent 55%), radial-gradient(circle at bottom right, #fef3c7 0, transparent 50%), #f3f4ff;
}

.hero-inner {
    display: grid;
    gap: 32px;
    grid-template-columns: minmax(0, 3fr) minmax(0, 2fr);
    align-items: center;
}

.hero-text h1 {
    font-size: 32px;
    margin-bottom: 12px;
}

.hero-sub {
    color: #4b5563;
    margin-bottom: 16px;
    max-width: 480px;
}

.hero-bullets {
    margin: 0 0 20px;
    padding-left: 18px;
    color: #374151;
    font-size: 14px;
}

.hero-cta-group {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 12px;
}

.hero-trust {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    font-size: 12px;
    color: #6b7280;
}

.hero-visual {
    display: flex;
    justify-content: flex-end;
}

.hero-card {
    background: #ffffff;
    border-radius: 20px;
    padding: 20px 20px 18px;
    box-shadow: 0 20px 45px rgba(148, 163, 184, 0.45);
    max-width: 320px;
}

.hero-card-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 12px;
}

.pill {
    padding: 4px 10px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 600;
}

.pill-hot {
    background: #fee2e2;
    color: #b91c1c;
}

.pill-price {
    background: #e0e7ff;
    color: #3730a3;
}

.hero-card-title {
    font-weight: 600;
    margin-bottom: 10px;
}

.hero-card-list {
    margin: 0 0 14px;
    padding-left: 18px;
    font-size: 13px;
    color: #4b5563;
}

.hero-card-note {
    margin-top: 8px;
    font-size: 11px;
    color: #6b7280;
}

/* Grid helpers */

.grid-3 {
    display: grid;
    gap: 20px;
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-2 {
    display: grid;
    gap: 20px;
    /* grid-template-columns: repeat(2, minmax(0, 1fr)); */
}

.card {
    background: #ffffff;
    border-radius: 16px;
    padding: 18px 16px;
    box-shadow: 0 10px 25px rgba(148, 163, 184, 0.22);
    font-size: 14px;
    color: #4b5563;
}

    .card h3 {
        font-size: 16px;
        margin-bottom: 8px;
    }

/* Preview section */

.preview-layout {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
}

.preview-block h3 {
    font-size: 16px;
    margin-bottom: 8px;
}

.preview-card {
    background: #f9fafb;
    border-radius: 14px;
    padding: 14px 16px;
    border: 1px solid #e5e7eb;
    font-size: 14px;
}

.preview-label {
    font-size: 12px;
    color: #6b7280;
    margin-bottom: 8px;
}

.preview-question {
    margin-bottom: 10px;
}

.preview-options {
    margin: 0 0 10px;
    padding-left: 18px;
}

.preview-meta {
    font-size: 12px;
    color: #6b7280;
}

.preview-solution {
    margin: 0 0 8px;
    padding-left: 18px;
}

.tag {
    display: inline-flex;
    padding: 2px 8px;
    border-radius: 999px;
    font-size: 11px;
    border: 1px solid #d1d5db;
    margin-right: 4px;
}

.tag-medium {
    background: #fef9c3;
    border-color: #facc15;
}

.centered-cta {
    text-align: center;
    margin-top: 28px;
}

.small-note {
    font-size: 12px;
    color: #6b7280;
    margin-top: 8px;
}

/* Comparison section */

.comparison-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
}

.comparison-card {
    background: #ffffff;
    border-radius: 18px;
    padding: 20px 18px;
    box-shadow: 0 16px 35px rgba(148, 163, 184, 0.25);
    font-size: 14px;
}

    .comparison-card ul {
        margin: 10px 0 0;
        padding-left: 18px;
    }

    .comparison-card.highlight {
        border: 2px solid #6366f1;
    }

/* Social proof */

.testimonial .quote {
    font-style: italic;
    color: #374151;
    margin-bottom: 10px;
}

.testimonial .author {
    font-weight: 600;
    font-size: 13px;
    margin-bottom: 4px;
}

.testimonial .rating {
    font-size: 13px;
    color: #f97316;
}

.stats-row {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    margin-top: 28px;
}

.stat {
    min-width: 140px;
}

.stat-value {
    display: block;
    font-size: 24px;
    font-weight: 700;
    color: #111827;
}

.stat-label {
    font-size: 12px;
    color: #6b7280;
}

/* FAQ */

.faq-list details {
    margin-bottom: 10px;
    background: #ffffff;
    border-radius: 10px;
    border: 1px solid #e5e7eb;
    padding: 8px 12px;
}

.faq-list summary {
    cursor: pointer;
    font-weight: 500;
    font-size: 14px;
}

    .faq-list summary::-webkit-details-marker {
        display: none;
    }

    .faq-list summary::after {
        content: "＋";
        float: right;
        font-size: 14px;
        color: #9ca3af;
    }

.faq-list details[open] summary::after {
    content: "−";
}

.faq-list p {
    margin-top: 6px;
    font-size: 13px;
    color: #4b5563;
}

/* Urgency */

.section-urgency {
    background: linear-gradient(135deg, #111827, #1e293b);
    color: #f9fafb;
}

.urgency-inner {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 24px;
    align-items: center;
}

.urgency-text h2 {
    color: #f9fafb;
}

.urgency-meta p {
    margin: 0 0 4px;
    font-size: 14px;
}

/* Payment info */

/* Sticky CTA */

.sticky-cta {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    background: #111827;
    color: #f9fafb;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 16px;
    z-index: 60;
}

.sticky-text {
    font-size: 13px;
}

/* Footer */

.lp-footer {
    background: #020617;
    color: #9ca3af;
    padding: 20px 0 36px;
    margin-top: 56px;
}

.footer-inner {
    text-align: center;
    font-size: 13px;
}

.footer-links a {
    color: #e5e7eb;
    text-decoration: none;
}

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

/* Responsive */

@media (max-width: 900px) {
    .hero-inner {
        grid-template-columns: 1fr;
    }

    .hero-visual {
        justify-content: flex-start;
    }

    .grid-3 {
        grid-template-columns: 1fr 1fr;
    }

    .preview-layout,
    .comparison-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .grid-3 {
        grid-template-columns: 1fr;
    }

    .hero {
        padding-top: 64px;
    }

    .lp-nav {
        display: none;
    }
}
/* Reset button background for subject buttons */
.btn-subject {
    border: none !important;
    color: #fff !important;
    box-shadow: none !important;
}

/* Physics Gradient Button */
.btn-physics {
    background: linear-gradient(135deg, #3b82f6, #6366f1) !important;
    box-shadow: 0 10px 20px rgba(99, 102, 241, 0.4) !important;
}

    .btn-physics:hover {
        transform: translateY(-1px);
        box-shadow: 0 14px 26px rgba(99, 102, 241, 0.55) !important;
    }

/* Chemistry Gradient Button */
.btn-chemistry {
    background: linear-gradient(135deg, #f59e0b, #fbbf24) !important;
    box-shadow: 0 10px 20px rgba(251, 191, 36, 0.4) !important;
}

    .btn-chemistry:hover {
        transform: translateY(-1px);
        box-shadow: 0 14px 26px rgba(251, 191, 36, 0.55) !important;
    }

/* Mathematics Gradient Button */
.btn-math {
    background: linear-gradient(135deg, #10b981, #14b8a6) !important;
    box-shadow: 0 10px 20px rgba(20, 184, 166, 0.4) !important;
}

    .btn-math:hover {
        transform: translateY(-1px);
        box-shadow: 0 14px 26px rgba(20, 184, 166, 0.55) !important;
    }

.reviews-layout {
    display: grid;
    grid-template-columns: minmax(0, 2fr) minmax(0, 3fr);
    gap: 24px;
}

.review-form-wrap h3,
.review-list-wrap h3 {
    margin-bottom: 12px;
}

.form-row {
    margin-bottom: 10px;
    font-size: 13px;
}

    .form-row label {
        display: block;
        margin-bottom: 4px;
        font-weight: 500;
    }

    .form-row input,
    .form-row select,
    .form-row textarea {
        width: 100%;
        padding: 8px 10px;
        border-radius: 8px;
        border: 1px solid #d1d5db;
        font-size: 13px;
        font-family: inherit;
        outline: none;
    }

        .form-row input:focus,
        .form-row select:focus,
        .form-row textarea:focus {
            border-color: #6366f1;
            box-shadow: 0 0 0 1px rgba(99, 102, 241, 0.35);
        }

.review-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
    margin-top: 8px;
}

.review-card {
    font-size: 13px;
}

.review-text {
    margin-bottom: 8px;
    color: #111827;
}

.review-meta {
    margin: 0 0 4px;
    color: #4b5563;
}

.review-rating {
    margin: 0;
    font-size: 13px;
    color: #f97316;
}

    .review-rating .rating-number {
        color: #6b7280;
        margin-left: 4px;
    }

@media (max-width: 900px) {
    .reviews-layout {
        grid-template-columns: 1fr;
    }

    .review-grid {
        grid-template-columns: 1fr;
    }
}

.hero {
    height: auto !important;
}