/* ============================================================
 * LANDING PAGE — Hero, Features, Benefits, Steps, FAQ, CTA
 * ============================================================ */

/* Tiện ích chữ gradient */
.lp-gradient-text {
    background: linear-gradient(135deg, var(--color-primary), #2563eb, #06b6d4);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Huy hiệu */
.lp-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 16px;
    border-radius: 99px;
    font-size: 0.8rem;
    font-weight: 600;
    background: rgba(34, 197, 94, 0.12);
    color: #22c55e;
    border: 1px solid rgba(34, 197, 94, 0.25);
    margin-bottom: 16px;
}

/* ---- HERO ---- */
.lp-hero {
    position: relative;
    overflow: hidden;
    padding: 80px 0 60px;
    min-height: 520px;
}

.lp-hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
    pointer-events: none;
}

.lp-hero-shape {
    position: absolute;
    border-radius: 50%;
    opacity: 0.12;
    filter: blur(80px);
    animation: lpFloat 8s ease-in-out infinite;
}

.lp-hero-shape-1 {
    width: 500px;
    height: 500px;
    background: var(--color-primary);
    top: -120px;
    left: -100px;
}

.lp-hero-shape-2 {
    width: 400px;
    height: 400px;
    background: #2563eb;
    bottom: -80px;
    right: -60px;
    animation-delay: -3s;
}

.lp-hero-shape-3 {
    width: 300px;
    height: 300px;
    background: #06b6d4;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: -5s;
}

@keyframes lpFloat {
    0%, 100% { transform: translateY(0) scale(1); }
    50% { transform: translateY(-30px) scale(1.05); }
}

.lp-hero-inner {
    position: relative;
    z-index: 1;
    max-width: 1160px;
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: 60px;
    align-items: center;
}

.lp-hero-content h1 {
    font-size: 2.4rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.lp-hero-desc {
    font-size: 1.05rem;
    line-height: 1.7;
    color: var(--text-secondary);
    margin-bottom: 28px;
}

.lp-hero-desc strong {
    color: var(--text-primary);
}

/* Dòng thống kê */
.lp-hero-stats {
    display: flex;
    align-items: center;
    gap: 24px;
    padding: 20px 24px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
}

.lp-hero-stat {
    text-align: center;
    flex: 1;
}

.lp-hero-stat-number {
    display: block;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-primary);
}

.lp-hero-stat-label {
    font-size: 0.78rem;
    color: var(--text-tertiary);
    margin-top: 2px;
}

.lp-hero-stat-divider {
    width: 1px;
    height: 36px;
    background: var(--border-primary);
}

/* ---- THẺ FORM ĐĂNG NHẬP ---- */
.lp-form-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-xl);
    padding: 32px 28px;
    box-shadow: var(--shadow-xl);
}

.lp-form-header {
    text-align: center;
    margin-bottom: 24px;
}

.lp-form-header h2 {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 4px;
}

.lp-form-header p {
    font-size: 0.85rem;
    color: var(--text-tertiary);
    margin: 0;
}

.lp-form-group {
    margin-bottom: 16px;
}

.lp-form-group label {
    display: block;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.lp-form-group label i {
    margin-right: 4px;
    color: var(--text-tertiary);
}

.lp-form-group input {
    width: 100%;
    padding: 11px 14px;
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.lp-btn-login {
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    color: #fff;
    background: linear-gradient(135deg, var(--color-primary), #2563eb);
    transition: transform 0.15s, box-shadow 0.15s;
    margin-top: 4px;
}

.lp-btn-login:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(37, 99, 235, 0.35);
}

.lp-form-footer {
    text-align: center;
    margin-top: 18px;
    font-size: 0.82rem;
}

.lp-form-footer a {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 500;
}

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

.lp-form-divider {
    margin: 0 8px;
    color: var(--text-tertiary);
}

/* ---- GOOGLE OAUTH BUTTON ---- */
.lp-oauth-divider {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 16px 0;
}
.lp-oauth-divider::before,
.lp-oauth-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border-primary);
}
.lp-oauth-divider span {
    font-size: 0.8rem;
    color: var(--text-tertiary);
    text-transform: lowercase;
}
.lp-btn-google {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;
    padding: 11px 16px;
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--text-primary);
    background: var(--bg-primary);
    text-decoration: none;
    transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
    cursor: pointer;
}
.lp-btn-google:hover {
    border-color: #4285f4;
    box-shadow: 0 2px 8px rgba(66, 133, 244, 0.2);
    background: var(--bg-secondary);
}

/* ---- PHẦN DÙNG CHUNG ---- */
.lp-section {
    padding: 72px 0;
}

.lp-section-inner {
    max-width: 1060px;
    margin: 0 auto;
    padding: 0 24px;
}

.lp-section-header {
    text-align: center;
    margin-bottom: 48px;
}

.lp-section-tag {
    display: inline-block;
    padding: 5px 14px;
    border-radius: 99px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    background: rgba(37, 99, 235, 0.08);
    color: #2563eb;
    border: 1px solid rgba(37, 99, 235, 0.15);
    margin-bottom: 14px;
}

.lp-section-header h2 {
    font-size: 1.9rem;
    font-weight: 800;
    color: var(--text-primary);
    margin: 0 0 12px;
    line-height: 1.25;
}

.lp-section-desc {
    max-width: 680px;
    margin: 0 auto;
    font-size: 1rem;
    line-height: 1.7;
    color: var(--text-secondary);
}

.lp-section-desc strong {
    color: var(--text-primary);
}

/* ---- GIỚI THIỆU / TÍNH NĂNG ---- */
.lp-about {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-primary);
    border-bottom: 1px solid var(--border-primary);
}

.lp-features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.lp-feature-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    padding: 28px 24px;
    transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
}

.lp-feature-card:hover {
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
}

.lp-feature-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    margin-bottom: 16px;
}

.lp-feature-icon-blue { background: rgba(37, 99, 235, 0.1); color: #2563eb; }
.lp-feature-icon-green { background: rgba(34, 197, 94, 0.1); color: #22c55e; }
.lp-feature-icon-orange { background: rgba(245, 158, 11, 0.1); color: #f59e0b; }

.lp-feature-card h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 8px;
}

.lp-feature-card p {
    font-size: 0.88rem;
    line-height: 1.65;
    color: var(--text-secondary);
    margin: 0;
}

.lp-feature-card p strong { color: var(--text-primary); }

/* ---- LỢI ÍCH ---- */
.lp-benefits-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.lp-benefit-item {
    display: flex;
    gap: 18px;
    align-items: flex-start;
    padding: 24px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    transition: border-color 0.2s;
}

.lp-benefit-item:hover { border-color: var(--color-primary); }

.lp-benefit-number {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--color-primary), #2563eb);
    color: #fff;
}

.lp-benefit-content h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 6px;
}

.lp-benefit-content p {
    font-size: 0.88rem;
    line-height: 1.65;
    color: var(--text-secondary);
    margin: 0;
}

.lp-benefit-content p strong { color: var(--text-primary); }

/* ---- CÁC BƯỚC ---- */
.lp-steps {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-primary);
    border-bottom: 1px solid var(--border-primary);
}

.lp-steps-grid {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
}

.lp-step-card {
    flex: 1;
    max-width: 280px;
    text-align: center;
    padding: 32px 20px;
    background: var(--bg-primary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    position: relative;
    transition: transform 0.2s, box-shadow 0.2s;
}

.lp-step-card:hover { box-shadow: var(--shadow-lg); }

.lp-step-number {
    position: absolute;
    top: -14px;
    left: 50%;
    transform: translateX(-50%);
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-primary), #2563eb);
    color: #fff;
    font-size: 0.78rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
}

.lp-step-icon {
    font-size: 1.8rem;
    color: var(--color-primary);
    margin-bottom: 14px;
}

.lp-step-card h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 8px;
}

.lp-step-card p {
    font-size: 0.85rem;
    line-height: 1.6;
    color: var(--text-secondary);
    margin: 0;
}

.lp-step-connector {
    color: var(--text-tertiary);
    font-size: 1.2rem;
    flex-shrink: 0;
}

/* ---- CÂU HỎI THƯỜNG GẶP ---- */
.lp-faq-list {
    max-width: 700px;
    margin: 0 auto;
}

.lp-faq-item {
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    margin-bottom: 10px;
    overflow: hidden;
    background: var(--bg-secondary);
    transition: border-color 0.2s;
}

.lp-faq-item[open] { border-color: var(--color-primary); }

.lp-faq-item summary {
    padding: 16px 20px;
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-primary);
    cursor: pointer;
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: background 0.15s;
}

.lp-faq-item summary:hover { background: var(--bg-tertiary); }

.lp-faq-item summary::after {
    content: '+';
    font-size: 1.3rem;
    font-weight: 300;
    color: var(--text-tertiary);
    transition: transform 0.2s;
}

.lp-faq-item[open] summary::after {
    content: '−';
    color: var(--color-primary);
}

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

.lp-faq-answer {
    padding: 0 20px 18px;
    font-size: 0.9rem;
    line-height: 1.7;
    color: var(--text-secondary);
}

.lp-faq-answer a { color: var(--color-primary); }
.lp-faq-answer p { margin: 0; }
.lp-faq-answer p strong { color: var(--text-primary); }

/* ---- LỜI KÊU GỌI ---- */
.lp-cta {
    text-align: center;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.06), rgba(6, 182, 212, 0.06));
    border-top: 1px solid var(--border-primary);
}

.lp-cta-inner {
    max-width: 600px;
    margin: 0 auto;
    padding: 0 24px;
}

.lp-cta-inner h2 {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--text-primary);
    margin: 0 0 10px;
}

.lp-cta-inner p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin: 0 0 28px;
}

.lp-cta-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}

.lp-btn-cta {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    transition: transform 0.15s, box-shadow 0.15s;
}

.lp-btn-cta:hover { transform: translateY(-2px); }

.lp-btn-cta-primary {
    background: linear-gradient(135deg, var(--color-primary), #2563eb);
    color: #fff;
    box-shadow: 0 4px 15px rgba(37, 99, 235, 0.25);
}

.lp-btn-cta-primary:hover { box-shadow: 0 6px 20px rgba(37, 99, 235, 0.4); }

.lp-btn-cta-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-primary);
}

.lp-btn-cta-secondary:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

/* ============================================================
 * RESPONSIVE — Landing Page
 * ============================================================ */
@media (max-width: 900px) {
    .lp-hero {
        padding: 40px 0 40px;
    }

    .lp-hero-inner {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .lp-hero-content h1 {
        font-size: 1.7rem;
    }

    .lp-hero-stats {
        gap: 16px;
        padding: 16px;
    }

    .lp-hero-stat-number {
        font-size: 1.2rem;
    }

    .lp-features-grid {
        grid-template-columns: 1fr;
    }

    .lp-benefits-grid {
        grid-template-columns: 1fr;
    }

    .lp-steps-grid {
        flex-direction: column;
        gap: 12px;
    }

    .lp-step-connector {
        transform: rotate(90deg);
    }

    .lp-step-card {
        max-width: 100%;
        width: 100%;
    }

    .lp-section-header h2 {
        font-size: 1.5rem;
    }

    .lp-section {
        padding: 48px 0;
    }

    .lp-cta-inner h2 {
        font-size: 1.4rem;
    }

    .lp-form-card {
        padding: 24px 20px;
    }
}

@media (max-width: 480px) {
    .lp-hero-content h1 {
        font-size: 1.4rem;
    }

    .lp-hero-desc {
        font-size: 0.92rem;
    }

    .lp-form-card {
        padding: 24px 18px;
    }

    .lp-cta-actions {
        flex-direction: column;
    }

    .lp-btn-cta {
        justify-content: center;
    }
}