@charset "UTF-8";

/* ==========================================================================
   LANDING PAGE STYLES - LÊ SƠN DŨNG | THẦN SỐ HỌC PYTHAGORAS
   Phong cách sang trọng: Dark Slate & Warm Gold Accent - Chuẩn Font Arial
   ========================================================================== */

:root {
    --bg-dark: #0f172a;
    --bg-darker: #090d16;
    --bg-card: #1e293b;
    --bg-card-hover: #24344d;
    --border-color: #334155;
    --border-gold: rgba(229, 169, 59, 0.35);
    --gold: #e5a93b;
    --gold-light: #ffd584;
    --gold-dark: #b45309;
    --gold-gradient: linear-gradient(135deg, #ffd584 0%, #e5a93b 50%, #b45309 100%);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --text-dark: #1e293b;
    --font-family: Arial, "Helvetica Neue", Helvetica, sans-serif;
    --shadow-soft: 0 10px 25px -5px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 35px rgba(229, 169, 59, 0.18);
    --radius-md: 12px;
    --radius-lg: 18px;
    --container-max: 1160px;
}

*, *::before, *::after, html, body, h1, h2, h3, h4, h5, h6, p, span, a, input, select, textarea, button, div {
    font-family: Arial, "Helvetica Neue", Helvetica, sans-serif !important;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

html {
    scroll-behavior: smooth;
    font-family: Arial, "Helvetica Neue", Helvetica, sans-serif;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: Arial, "Helvetica Neue", Helvetica, sans-serif;
    line-height: 1.7;
    overflow-x: hidden;
}

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 20px;
}

/* NAVBAR */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(15, 23, 42, 0.92);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(51, 65, 85, 0.7);
    padding: 14px 0;
    transition: all 0.3s ease;
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
}

.nav-logo-icon {
    width: 36px;
    height: 36px;
    background: var(--gold-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #0f172a;
    font-weight: bold;
    font-size: 18px;
    box-shadow: 0 0 15px rgba(229, 169, 59, 0.4);
}

.nav-brand-text {
    display: flex;
    flex-direction: column;
}

.nav-name {
    font-size: 17px;
    font-weight: bold;
    font-family: Arial, "Helvetica Neue", Helvetica, sans-serif !important;
    color: #ffffff;
    letter-spacing: 0.5px;
}

.nav-tagline {
    font-size: 11px;
    color: var(--gold);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.nav-menu {
    display: flex;
    align-items: center;
    list-style: none;
    gap: 24px;
}

.nav-link {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    transition: color 0.2s;
}

.nav-link:hover {
    color: var(--gold-light);
}

.btn-nav-cta {
    background: var(--gold-gradient);
    color: #0f172a;
    font-weight: 700;
    font-size: 13px;
    padding: 9px 20px;
    border-radius: 25px;
    text-decoration: none;
    box-shadow: 0 4px 15px rgba(229, 169, 59, 0.3);
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn-nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(229, 169, 59, 0.45);
}

/* HERO SECTION */
.hero-section {
    padding: 150px 0 90px;
    background: radial-gradient(circle at 50% 15%, #1e293b 0%, #0f172a 75%);
    position: relative;
    overflow: hidden;
    text-align: center;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 350px;
    background: radial-gradient(ellipse, rgba(229, 169, 59, 0.15), transparent 70%);
    pointer-events: none;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 18px;
    background: rgba(229, 169, 59, 0.12);
    border: 1px solid var(--border-gold);
    border-radius: 30px;
    color: var(--gold);
    font-size: 12.5px;
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 22px;
}

.hero-title {
    font-size: 2.8rem;
    font-weight: bold;
    font-family: Arial, "Helvetica Neue", Helvetica, sans-serif !important;
    line-height: 1.3;
    margin-bottom: 20px;
    color: #ffffff;
    max-width: 920px;
    margin-left: auto;
    margin-right: auto;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--text-muted);
    max-width: 760px;
    margin: 0 auto 35px;
    line-height: 1.75;
}

.hero-cta-group {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 50px;
    flex-wrap: wrap;
}

.btn-primary-hero {
    background: var(--gold-gradient);
    color: #0f172a;
    font-size: 16px;
    font-weight: 800;
    padding: 15px 34px;
    border-radius: 30px;
    text-decoration: none;
    box-shadow: 0 8px 25px rgba(229, 169, 59, 0.35);
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-primary-hero:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 12px 30px rgba(229, 169, 59, 0.5);
}

.btn-secondary-hero {
    background: rgba(30, 41, 59, 0.8);
    border: 1px solid var(--border-color);
    color: #ffffff;
    font-size: 15px;
    font-weight: 700;
    padding: 15px 28px;
    border-radius: 30px;
    text-decoration: none;
    transition: all 0.2s;
}

.btn-secondary-hero:hover {
    background: rgba(51, 65, 85, 0.9);
    border-color: var(--gold);
    color: var(--gold-light);
}

/* STATS BAR */
.hero-stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    max-width: 950px;
    margin: 0 auto;
    padding: 24px;
    background: rgba(30, 41, 59, 0.6);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(10px);
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 2rem;
    font-weight: 900;
    color: var(--gold);
    margin-bottom: 4px;
}

.stat-label {
    font-size: 12.5px;
    color: var(--text-muted);
    font-weight: 600;
}

/* SECTION COMMON */
.section {
    padding: 90px 0;
    border-bottom: 1px solid rgba(51, 65, 85, 0.5);
}

.section-alt {
    background: var(--bg-darker);
}

.section-header-center {
    text-align: center;
    max-width: 720px;
    margin: 0 auto 55px;
}

.section-tag {
    display: inline-block;
    color: var(--gold);
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin-bottom: 10px;
}

.section-heading {
    font-size: 2.2rem;
    font-weight: bold;
    font-family: Arial, "Helvetica Neue", Helvetica, sans-serif !important;
    line-height: 1.3;
    margin-bottom: 15px;
    color: #ffffff;
}

.section-desc {
    color: var(--text-muted);
    font-size: 1.05rem;
}

/* 4 PILLARS GRID */
.pillars-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.pillar-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 30px;
    transition: transform 0.3s, border-color 0.3s;
    display: flex;
    flex-direction: column;
}

.pillar-card:hover {
    transform: translateY(-5px);
    border-color: var(--border-gold);
    box-shadow: var(--shadow-glow);
}

.pillar-icon-box {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    background: rgba(229, 169, 59, 0.15);
    color: var(--gold);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    margin-bottom: 20px;
    border: 1px solid var(--border-gold);
}

.pillar-title {
    font-size: 1.35rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: #ffffff;
}

.pillar-desc {
    color: var(--text-muted);
    font-size: 14px;
    line-height: 1.7;
    margin-bottom: 18px;
    flex-grow: 1;
}

.pillar-list {
    list-style: none;
    border-top: 1px dashed var(--border-color);
    padding-top: 15px;
}

.pillar-list li {
    font-size: 13px;
    color: #cbd5e1;
    margin-bottom: 6px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.pillar-list li::before {
    content: '✦';
    color: var(--gold);
    font-size: 11px;
}

/* ABOUT AUTHOR SECTION */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1.35fr;
    gap: 45px;
    align-items: center;
}

.author-image-wrapper {
    position: relative;
    text-align: center;
}

.author-card-box {
    background: linear-gradient(145deg, #1e293b 0%, #0f172a 100%);
    border: 1.5px solid var(--border-gold);
    border-radius: var(--radius-lg);
    padding: 35px 25px;
    box-shadow: var(--shadow-glow);
    text-align: center;
}

.author-avatar {
    width: 140px;
    height: 140px;
    border-radius: 50%;
    margin: 0 auto 20px;
    background: var(--gold-gradient);
    padding: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.author-avatar-inner {
    width: 100%;
    height: 100%;
    background: #0f172a;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    font-weight: 900;
    color: var(--gold-light);
}

.author-name {
    font-size: 1.7rem;
    font-weight: bold;
    font-family: Arial, "Helvetica Neue", Helvetica, sans-serif !important;
    color: #ffffff;
    margin-bottom: 5px;
}

.author-role {
    font-size: 13.5px;
    color: var(--gold);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 20px;
}

.author-badges-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    margin-top: 15px;
}

.author-badge-item {
    background: rgba(15, 23, 42, 0.8);
    border: 1px solid var(--border-color);
    padding: 10px;
    border-radius: 8px;
}

.author-badge-num {
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--gold-light);
}

.author-badge-title {
    font-size: 11px;
    color: var(--text-muted);
}

.about-content h3 {
    font-size: 1.8rem;
    font-weight: 800;
    margin-bottom: 18px;
    color: #ffffff;
}

.about-content p {
    color: #cbd5e1;
    font-size: 15px;
    line-height: 1.8;
    margin-bottom: 18px;
}

.author-quote-box {
    background: rgba(30, 41, 59, 0.8);
    border-left: 4px solid var(--gold);
    padding: 16px 20px;
    border-radius: 0 8px 8px 0;
    margin: 24px 0;
    font-style: italic;
    color: var(--gold-light);
}

/* REPORT CONTENT MODULES */
.report-modules-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.module-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 24px;
    transition: all 0.3s;
}

.module-card:hover {
    border-color: var(--gold);
    transform: translateY(-4px);
}

.module-num-badge {
    display: inline-block;
    font-size: 11px;
    font-weight: 800;
    background: rgba(229, 169, 59, 0.15);
    color: var(--gold);
    padding: 3px 10px;
    border-radius: 12px;
    margin-bottom: 12px;
    border: 1px solid var(--border-gold);
}

.module-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 10px;
}

.module-desc {
    color: var(--text-muted);
    font-size: 13.5px;
    line-height: 1.6;
}

/* TESTIMONIALS */
.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 22px;
}

.testimonial-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 26px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.testimonial-stars {
    color: var(--gold);
    font-size: 14px;
    margin-bottom: 14px;
}

.testimonial-text {
    color: #cbd5e1;
    font-size: 14px;
    line-height: 1.7;
    margin-bottom: 20px;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 12px;
    border-top: 1px solid var(--border-color);
    padding-top: 14px;
}

.author-initial {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: var(--gold-gradient);
    color: #0f172a;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 14px;
}

.author-meta-name {
    font-size: 13.5px;
    font-weight: 700;
    color: #ffffff;
}

.author-meta-info {
    font-size: 11.5px;
    color: var(--text-muted);
}

/* FORM SECTION */
.form-section {
    padding: 100px 0;
    background: radial-gradient(circle at 50% 30%, #1e293b 0%, #090d16 100%);
    position: relative;
}

.form-wrapper-box {
    max-width: 680px;
    margin: 0 auto;
    background: #131d2e;
    border: 1.5px solid var(--border-gold);
    border-radius: var(--radius-lg);
    padding: 40px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6), var(--shadow-glow);
}

.form-title {
    font-size: 1.9rem;
    font-weight: bold;
    font-family: Arial, "Helvetica Neue", Helvetica, sans-serif !important;
    text-align: center;
    color: #ffffff;
    margin-bottom: 8px;
}

.form-subtitle {
    text-align: center;
    color: var(--text-muted);
    font-size: 14px;
    margin-bottom: 30px;
}

.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    font-size: 13.5px;
    font-weight: 700;
    color: #f1f5f9;
    margin-bottom: 8px;
}

.form-control {
    width: 100%;
    padding: 13px 16px;
    background: #0f172a;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: #ffffff;
    font-size: 14.5px;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-control:focus {
    outline: none;
    border-color: var(--gold);
    box-shadow: 0 0 0 3px rgba(229, 169, 59, 0.2);
}

.dob-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
}

.btn-submit-form {
    width: 100%;
    background: var(--gold-gradient);
    color: #0f172a;
    font-size: 16.5px;
    font-weight: 800;
    padding: 16px;
    border: none;
    border-radius: 30px;
    cursor: pointer;
    box-shadow: 0 8px 25px rgba(229, 169, 59, 0.4);
    transition: all 0.3s;
    margin-top: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.btn-submit-form:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 30px rgba(229, 169, 59, 0.6);
}

.form-privacy-note {
    text-align: center;
    font-size: 12px;
    color: #64748b;
    margin-top: 16px;
}

/* FORM SUCCESS CONFIRMATION BOX */
.form-success-box {
    text-align: center;
    padding: 10px 0;
    animation: fadeIn 0.4s ease-out;
}

.success-icon-badge {
    width: 70px;
    height: 70px;
    background: var(--gold-gradient);
    border-radius: 50%;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    box-shadow: 0 0 30px rgba(229, 169, 59, 0.5);
}

.success-title {
    font-size: 1.65rem;
    font-weight: 800;
    color: #ffffff;
    margin-bottom: 12px;
}

.success-highlight-card {
    background: #0f172a;
    border: 1px solid var(--border-gold);
    border-radius: var(--radius-md);
    padding: 20px;
    margin: 20px 0;
    text-align: left;
}

.success-info-row {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px dashed #334155;
    font-size: 14px;
}

.success-info-row:last-child {
    border-bottom: none;
}

.success-info-label {
    color: var(--text-muted);
}

.success-info-val {
    font-weight: 700;
    color: var(--gold-light);
}

.success-message {
    color: #e2e8f0;
    font-size: 14.5px;
    line-height: 1.7;
    margin-bottom: 18px;
}

.success-tip {
    background: rgba(229, 169, 59, 0.1);
    border-left: 3px solid var(--gold);
    padding: 12px 16px;
    border-radius: 6px;
    font-size: 13px;
    color: #ffd584;
    text-align: left;
    margin-bottom: 25px;
    line-height: 1.6;
}

.btn-reset-form {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    padding: 10px 20px;
    border-radius: 20px;
    font-size: 13px;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-reset-form:hover {
    border-color: var(--gold);
    color: #ffffff;
}

/* 1-ON-1 CONSULTATION CTA BOX */
.consultation-cta-box {
    background: linear-gradient(135deg, rgba(229, 169, 59, 0.12) 0%, rgba(30, 41, 59, 0.9) 100%);
    border: 1.5px solid var(--border-gold);
    border-radius: var(--radius-lg);
    padding: 40px;
    text-align: center;
    max-width: 860px;
    margin: 60px auto 0;
}

.consultation-title {
    font-size: 1.8rem;
    font-weight: bold;
    font-family: Arial, "Helvetica Neue", Helvetica, sans-serif !important;
    color: var(--gold-light);
    margin-bottom: 12px;
}

.consultation-desc {
    color: #cbd5e1;
    font-size: 15px;
    max-width: 680px;
    margin: 0 auto 25px;
}

.contact-channels-group {
    display: flex;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
}

.btn-contact {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 11px 24px;
    border-radius: 25px;
    text-decoration: none;
    font-weight: 700;
    font-size: 14px;
    transition: transform 0.2s;
}

.btn-zalo {
    background: #0068ff;
    color: #ffffff;
}

.btn-facebook {
    background: #1877f2;
    color: #ffffff;
}

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

/* FOOTER */
.site-footer {
    background: #090d16;
    border-top: 1px solid var(--border-color);
    padding: 45px 0 25px;
    color: var(--text-muted);
    font-size: 13px;
    text-align: center;
}

.footer-brand {
    font-size: 18px;
    font-weight: 800;
    color: #ffffff;
    margin-bottom: 8px;
}

.footer-copy {
    margin-top: 20px;
    color: #64748b;
    font-size: 12px;
}

/* RESPONSIVE */
@media (max-width: 900px) {
    .hero-title { font-size: 2.2rem; }
    .pillars-grid { grid-template-columns: 1fr; }
    .about-grid { grid-template-columns: 1fr; }
    .report-modules-grid { grid-template-columns: 1fr; }
    .testimonials-grid { grid-template-columns: 1fr; }
    .hero-stats-grid { grid-template-columns: repeat(2, 1fr); }
    .nav-menu { display: none; }
}