/* ============================================
   THU HỒI NỢ PRO — Dark + Orange Glow Theme
   Inspired by NEX Marketing Digital style
   ============================================ */

:root {
    /* Deep Black */
    --black-900: #050505;
    --black-800: #0A0A0A;
    --black-700: #111111;
    --black-600: #181818;
    --black-500: #1F1F1F;
    --black-400: #282828;

    /* Orange / Amber */
    --orange-300: #FFB366;
    --orange-400: #FF9A40;
    --orange-500: #FF6B00;
    --orange-600: #E65100;
    --orange-700: #BF4300;
    --orange-glow: rgba(255, 107, 0, 0.25);
    --orange-glow-strong: rgba(255, 107, 0, 0.5);

    /* Surfaces */
    --bg-body: #050505;
    --bg-alt: #0A0A0A;
    --bg-card: rgba(17, 17, 17, 0.85);
    --bg-card-hover: rgba(25, 25, 25, 0.95);

    /* Text */
    --text-white: #FFFFFF;
    --text-light: #C0C0C0;
    --text-muted: #777777;

    /* Borders */
    --border: rgba(255, 255, 255, 0.06);
    --border-orange: rgba(255, 107, 0, 0.25);
    --border-orange-strong: rgba(255, 107, 0, 0.5);

    /* Gradients */
    --grad-orange: linear-gradient(135deg, #FF6B00 0%, #FF9A40 50%, #FF6B00 100%);
    --grad-orange-light: linear-gradient(135deg, #FF6B00 0%, #FFB366 100%);
    --grad-card: linear-gradient(145deg, rgba(17,17,17,0.9) 0%, rgba(5,5,5,0.98) 100%);
    --grad-dark: linear-gradient(180deg, #050505 0%, #0A0A0A 100%);

    /* Shadows */
    --shadow-orange: 0 4px 40px rgba(255, 107, 0, 0.25);
    --shadow-orange-lg: 0 8px 60px rgba(255, 107, 0, 0.35);
    --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.6);
    --shadow-dark: 0 8px 48px rgba(0, 0, 0, 0.8);

    /* Layout */
    --container-max: 1140px;
    --section-py: 110px;
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 22px;
    --radius-xl: 30px;
    --radius-full: 9999px;

    /* Transition */
    --ease: cubic-bezier(0.4, 0, 0.2, 1);
    --t-fast: 0.2s;
    --t-base: 0.35s;
    --t-slow: 0.6s;
}

/* === RESET === */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-body);
    color: var(--text-white);
    line-height: 1.7;
    font-size: 16px;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; transition: color var(--t-fast) var(--ease); }
ul { list-style: none; }
.container { max-width: var(--container-max); margin: 0 auto; padding: 0 24px; }

/* === ANIMATIONS === */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(36px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes pulse-ring {
    0% { box-shadow: 0 0 0 0 var(--orange-glow); }
    70% { box-shadow: 0 0 0 14px transparent; }
    100% { box-shadow: 0 0 0 0 transparent; }
}
@keyframes bounce-down {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(6px); }
}
@keyframes glow-breathe {
    0%, 100% { opacity: 0.4; transform: scale(1); }
    50% { opacity: 0.7; transform: scale(1.05); }
}

.animate-on-scroll {
    opacity: 0;
    transform: translateY(36px);
    transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
    transition-delay: var(--delay, 0s);
}
.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* === TYPOGRAPHY === */
.section-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 18px;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--orange-500);
    background: rgba(255, 107, 0, 0.06);
    border: 1px solid rgba(255, 107, 0, 0.15);
    border-radius: var(--radius-full);
    margin-bottom: 18px;
}

.tag-light {
    color: var(--orange-300);
    background: rgba(255, 107, 0, 0.1);
    border-color: rgba(255, 107, 0, 0.2);
}

.section-title {
    font-family: 'Inter', sans-serif;
    font-size: clamp(30px, 4.5vw, 52px);
    font-weight: 900;
    line-height: 1.15;
    letter-spacing: -0.03em;
    margin-bottom: 16px;
    text-transform: uppercase;
}

.text-accent {
    background: var(--grad-orange);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.accent { color: var(--orange-500); }

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section { padding: var(--section-py) 0; position: relative; }

/* === BUTTONS === */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 32px;
    font-family: 'Inter', sans-serif;
    font-size: 15px;
    font-weight: 700;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--t-base) var(--ease);
    white-space: nowrap;
    position: relative;
    overflow: hidden;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.btn svg { width: 18px; height: 18px; flex-shrink: 0; }

.btn-primary {
    background: var(--grad-orange);
    color: #000;
    box-shadow: var(--shadow-orange);
}
.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-orange-lg);
    filter: brightness(1.1);
}

.btn-submit {
    background: var(--grad-orange);
    color: #000;
    box-shadow: var(--shadow-orange);
}
.btn-submit:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-orange-lg);
    filter: brightness(1.1);
}

.btn-lg { padding: 18px 44px; font-size: 15px; border-radius: var(--radius-lg); }
.btn-full { width: 100%; }

/* === NAVBAR === */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 18px 0;
    transition: all var(--t-base) var(--ease);
}
.navbar.scrolled {
    padding: 10px 0;
    background: rgba(5, 5, 5, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}
.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    z-index: 1001;
}
.logo-icon { width: 36px; height: 36px; }
.logo-icon svg { width: 100%; height: 100%; }
.logo-text {
    font-size: 17px;
    font-weight: 900;
    letter-spacing: 1px;
    color: var(--text-white);
}
.nav-links {
    display: flex;
    align-items: center;
    gap: 4px;
}
.nav-links a {
    padding: 8px 16px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-muted);
    border-radius: var(--radius-sm);
    transition: all var(--t-fast) var(--ease);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.nav-links a:hover,
.nav-links a.active {
    color: var(--text-white);
    background: rgba(255, 255, 255, 0.05);
}
.nav-cta {
    padding: 10px 22px;
    font-size: 12px;
    font-weight: 800;
    background: var(--grad-orange);
    color: #000 !important;
    border-radius: var(--radius-sm);
    transition: all var(--t-base) var(--ease);
    text-transform: uppercase;
    letter-spacing: 1px;
}
.nav-cta:hover {
    box-shadow: var(--shadow-orange);
    transform: translateY(-1px);
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 1001;
}
.mobile-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-white);
    border-radius: 2px;
    transition: all var(--t-base) var(--ease);
}

/* === HERO === */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 0 80px;
    overflow: hidden;
}
.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}
.hero-bg-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center 25%;
    opacity: 0.35;
    filter: saturate(1.2);
}
.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        180deg,
        rgba(5, 5, 5, 0.5) 0%,
        rgba(5, 5, 5, 0.3) 40%,
        rgba(5, 5, 5, 0.95) 100%
    );
}

/* Glow orb — the signature orange halo */
.hero-glow-orb {
    position: absolute;
    top: 10%;
    right: 15%;
    width: 450px;
    height: 450px;
    background: radial-gradient(circle, rgba(255, 107, 0, 0.15) 0%, rgba(255, 107, 0, 0.05) 40%, transparent 70%);
    border-radius: 50%;
    z-index: 1;
    pointer-events: none;
    animation: glow-breathe 6s ease-in-out infinite;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 780px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 8px 20px;
    background: rgba(255, 107, 0, 0.06);
    border: 1px solid rgba(255, 107, 0, 0.15);
    border-radius: var(--radius-full);
    font-size: 12px;
    font-weight: 600;
    color: var(--orange-400);
    margin-bottom: 28px;
    letter-spacing: 1px;
    text-transform: uppercase;
}
.badge-pulse {
    width: 8px;
    height: 8px;
    background: var(--orange-500);
    border-radius: 50%;
    animation: pulse-ring 2s infinite;
}

.hero-title {
    font-family: 'Inter', sans-serif;
    font-size: clamp(36px, 6vw, 64px);
    font-weight: 900;
    line-height: 1.05;
    letter-spacing: -0.03em;
    margin-bottom: 20px;
    text-transform: uppercase;
}
.hero-title-accent {
    display: block;
    margin-top: 8px;
    font-size: clamp(18px, 2.5vw, 26px);
    font-weight: 400;
    font-style: italic;
    font-family: 'Playfair Display', serif;
    background: var(--grad-orange-light);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-transform: none;
    letter-spacing: 0;
    line-height: 1.5;
}

.hero-subtitle {
    font-size: clamp(15px, 1.8vw, 18px);
    color: var(--text-light);
    line-height: 1.85;
    margin-bottom: 36px;
    max-width: 600px;
}
.hero-subtitle strong {
    color: var(--orange-400);
    font-weight: 600;
}

.hero-actions { margin-bottom: 24px; }

.hero-guarantee {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    background: rgba(255, 107, 0, 0.06);
    border: 1px solid rgba(255, 107, 0, 0.12);
    border-radius: var(--radius-md);
    font-size: 14px;
    color: var(--text-light);
}
.hero-guarantee svg {
    width: 20px;
    height: 20px;
    stroke: var(--orange-500);
    flex-shrink: 0;
}
.hero-guarantee strong { color: var(--orange-400); }

/* Learn More Button */
.hero-learn-more {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 32px;
    font-size: 13px;
    font-weight: 600;
    color: var(--orange-400);
    background: rgba(255, 107, 0, 0.05);
    border: 1px solid rgba(255, 107, 0, 0.2);
    border-radius: var(--radius-full);
    cursor: pointer;
    text-decoration: none;
    transition: all var(--t-base) var(--ease);
    letter-spacing: 0.5px;
}
.hero-learn-more:hover {
    background: rgba(255, 107, 0, 0.1);
    border-color: rgba(255, 107, 0, 0.4);
    box-shadow: 0 0 30px rgba(255, 107, 0, 0.15);
    transform: translateX(-50%) translateY(-2px);
}
.learn-more-arrow {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background: rgba(255, 107, 0, 0.1);
    border-radius: 50%;
}
.learn-more-arrow svg {
    width: 14px;
    height: 14px;
    stroke: var(--orange-400);
    animation: bounce-down 2s ease infinite;
}

/* === PAIN SECTION === */
.pain-section { background: var(--bg-body); }

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

.pain-card {
    padding: 40px 32px;
    background: var(--grad-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: all var(--t-base) var(--ease);
    position: relative;
    overflow: hidden;
}
.pain-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--grad-orange);
    opacity: 0;
    transition: opacity var(--t-base);
}
.pain-card:hover {
    border-color: var(--border-orange);
    transform: translateY(-6px);
    box-shadow: 0 16px 48px rgba(255, 107, 0, 0.08);
}
.pain-card:hover::before { opacity: 1; }
.card-glow {
    position: absolute;
    bottom: -60px;
    right: -60px;
    width: 160px;
    height: 160px;
    background: radial-gradient(circle, rgba(255, 107, 0, 0.06) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
    transition: all var(--t-slow);
}
.pain-card:hover .card-glow {
    opacity: 1;
    transform: scale(1.5);
}

.pain-card-number {
    font-size: 56px;
    font-weight: 900;
    color: rgba(255, 107, 0, 0.08);
    line-height: 1;
    margin-bottom: 12px;
    letter-spacing: -2px;
    transition: color var(--t-base);
}
.pain-card:hover .pain-card-number {
    color: rgba(255, 107, 0, 0.15);
}

.pain-card h3 {
    font-size: 20px;
    font-weight: 800;
    margin-bottom: 10px;
    color: var(--text-white);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.pain-card p {
    font-size: 15px;
    color: var(--text-muted);
    line-height: 1.75;
}

/* === SOLUTION SECTION === */
.solution-section { background: var(--bg-alt); }

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

.solution-card {
    padding: 36px 32px;
    background: var(--grad-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: all var(--t-base) var(--ease);
    position: relative;
    overflow: hidden;
    text-align: center;
}
.solution-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% 0%, rgba(255, 107, 0, 0.06) 0%, transparent 60%);
    opacity: 0;
    transition: opacity var(--t-base);
}
.solution-card:hover {
    border-color: var(--border-orange);
    transform: translateY(-6px);
}
.solution-card:hover::before { opacity: 1; }

.solution-icon-wrap {
    width: 56px;
    height: 56px;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 107, 0, 0.08);
    border: 1px solid rgba(255, 107, 0, 0.12);
    border-radius: 16px;
    color: var(--orange-500);
    transition: all var(--t-base);
}
.solution-card:hover .solution-icon-wrap {
    background: rgba(255, 107, 0, 0.15);
    box-shadow: 0 0 24px rgba(255, 107, 0, 0.15);
    transform: scale(1.1);
}
.solution-icon-wrap svg { width: 26px; height: 26px; }

.solution-card h3 {
    font-size: 18px;
    font-weight: 800;
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    position: relative;
}

.solution-card p {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.75;
    position: relative;
}
.solution-card p strong { color: var(--orange-400); }

/* === PROCESS SECTION === */
.process-section { background: var(--bg-body); }

.process-timeline {
    max-width: 680px;
    margin: 0 auto;
    position: relative;
}

.timeline-line {
    position: absolute;
    left: 30px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--orange-500) 0%, rgba(255, 107, 0, 0.05) 100%);
}

.process-step {
    display: flex;
    gap: 28px;
    padding: 28px 0;
    position: relative;
}

.step-marker {
    position: relative;
    z-index: 1;
    flex-shrink: 0;
}

.step-num {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    font-weight: 900;
    color: var(--orange-500);
    background: var(--bg-body);
    border: 2px solid var(--orange-500);
    border-radius: 50%;
    transition: all var(--t-base);
}

.process-step:hover .step-num {
    background: rgba(255, 107, 0, 0.08);
    box-shadow: 0 0 24px var(--orange-glow);
}

.step-body h3 {
    font-size: 21px;
    font-weight: 800;
    margin-bottom: 8px;
    padding-top: 4px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.step-body p {
    font-size: 15px;
    color: var(--text-muted);
    line-height: 1.8;
}

/* === PROOF SECTION === */
.proof-section { background: var(--bg-alt); }

.proof-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 44px 48px;
    background: var(--grad-card);
    border: 1px solid var(--border-orange);
    border-radius: var(--radius-xl);
    margin-bottom: 56px;
    position: relative;
    overflow: hidden;
}
.proof-stats::after {
    content: '';
    position: absolute;
    top: -40%;
    left: 50%;
    transform: translateX(-50%);
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(255, 107, 0, 0.08) 0%, transparent 70%);
    pointer-events: none;
}

.proof-stat {
    text-align: center;
    flex: 1;
    padding: 0 24px;
    position: relative;
}

.proof-stat-number {
    font-size: 52px;
    font-weight: 900;
    color: var(--orange-400);
    line-height: 1;
    letter-spacing: -0.03em;
    margin-bottom: 6px;
}

.stat-plus {
    font-size: 28px;
    font-weight: 700;
    color: var(--orange-500);
}

.proof-stat-label {
    font-size: 13px;
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.proof-stat-divider {
    width: 1px;
    height: 60px;
    background: rgba(255, 107, 0, 0.15);
    flex-shrink: 0;
}

/* Testimonial */
.testimonial-block {
    max-width: 740px;
    margin: 0 auto;
    padding: 44px 48px;
    background: var(--grad-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    text-align: center;
    position: relative;
}

.testimonial-quote-mark {
    font-family: 'Playfair Display', serif;
    font-size: 100px;
    line-height: 0.5;
    color: rgba(255, 107, 0, 0.12);
    position: absolute;
    top: 24px;
    left: 40px;
    pointer-events: none;
}

.testimonial-block blockquote {
    font-size: 18px;
    font-style: italic;
    color: var(--text-light);
    line-height: 1.85;
    margin-bottom: 28px;
    font-family: 'Playfair Display', serif;
    position: relative;
}

.testimonial-author {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 14px;
}

.author-avatar-circle {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 107, 0, 0.1);
    color: var(--orange-400);
    font-weight: 900;
    font-size: 18px;
    border-radius: 50%;
    border: 2px solid var(--border-orange);
}

.author-info strong {
    display: block;
    font-size: 15px;
    margin-bottom: 2px;
}

.author-info span {
    font-size: 13px;
    color: var(--text-muted);
}

/* === FAQ SECTION === */
.faq-section { background: var(--bg-body); }

.faq-list {
    max-width: 740px;
    margin: 0 auto;
}

.faq-item {
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    margin-bottom: 12px;
    overflow: hidden;
    transition: border-color var(--t-base);
}

.faq-item.open {
    border-color: var(--border-orange);
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 20px 24px;
    background: var(--bg-card);
    border: none;
    color: var(--text-white);
    font-family: 'Inter', sans-serif;
    font-size: 15px;
    font-weight: 600;
    text-align: left;
    cursor: pointer;
    transition: all var(--t-fast);
}

.faq-question:hover {
    background: rgba(17, 17, 17, 0.95);
}

.faq-chevron {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    stroke: var(--text-muted);
    transition: transform var(--t-base) var(--ease);
}

.faq-item.open .faq-chevron {
    transform: rotate(180deg);
    stroke: var(--orange-500);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s var(--ease), padding 0.4s var(--ease);
    padding: 0 24px;
    background: rgba(10, 10, 10, 0.5);
}

.faq-item.open .faq-answer {
    max-height: 300px;
    padding: 0 24px 24px;
}

.faq-answer p {
    font-size: 15px;
    color: var(--text-muted);
    line-height: 1.8;
    padding-top: 12px;
    border-top: 1px solid var(--border);
}

.faq-answer strong { color: var(--orange-400); }

/* === REGISTER SECTION === */
.register-section {
    background: var(--bg-alt);
    position: relative;
    overflow: hidden;
}
.register-section::before {
    content: '';
    position: absolute;
    top: -200px;
    left: -150px;
    width: 450px;
    height: 450px;
    background: radial-gradient(circle, rgba(255, 107, 0, 0.05) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.register-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: start;
    position: relative;
    z-index: 1;
}

.register-title {
    font-size: clamp(28px, 4vw, 44px);
    font-weight: 900;
    line-height: 1.15;
    margin-bottom: 18px;
    text-transform: uppercase;
    letter-spacing: -0.02em;
}

.register-desc {
    font-size: 16px;
    color: var(--text-muted);
    line-height: 1.8;
    margin-bottom: 32px;
}
.register-desc strong { color: var(--orange-400); }

.register-guarantees {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
}

.guarantee-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-light);
}
.guarantee-item svg {
    width: 20px;
    height: 20px;
    stroke: var(--orange-500);
    flex-shrink: 0;
}

/* Form */
.register-form {
    padding: 40px 36px;
    background: var(--grad-card);
    border: 1px solid var(--border-orange);
    border-radius: var(--radius-xl);
}

.register-form h3 {
    font-size: 24px;
    font-weight: 900;
    margin-bottom: 6px;
    text-transform: uppercase;
}

.register-form > p {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 24px;
}

.form-group { margin-bottom: 18px; }

.form-group label {
    display: block;
    font-size: 12px;
    font-weight: 700;
    color: var(--text-light);
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.required { color: var(--orange-500); }

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 16px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-white);
    font-family: 'Inter', sans-serif;
    font-size: 15px;
    outline: none;
    transition: all var(--t-fast);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-muted);
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--orange-500);
    box-shadow: 0 0 0 3px rgba(255, 107, 0, 0.08);
}

.form-group textarea {
    resize: vertical;
    min-height: 80px;
}

/* Custom Radio & Checkbox */
.radio-group, .checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 12px;
}

.radio-label, .checkbox-label {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
    color: var(--text-white);
    cursor: pointer;
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    transition: all var(--t-fast);
}

.radio-label:hover, .checkbox-label:hover {
    border-color: rgba(255, 107, 0, 0.4);
    background: rgba(255, 107, 0, 0.03);
}

.radio-label input[type="radio"], .checkbox-label input[type="checkbox"] {
    appearance: none;
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    border: 2px solid var(--text-muted);
    border-radius: 50%;
    outline: none;
    cursor: pointer;
    position: relative;
    transition: all var(--t-fast);
    flex-shrink: 0;
}

.checkbox-label input[type="checkbox"] {
    border-radius: 4px;
}

.radio-label input[type="radio"]:checked, .checkbox-label input[type="checkbox"]:checked {
    border-color: var(--orange-500);
    box-shadow: 0 0 10px rgba(255, 107, 0, 0.3);
}

.radio-label input[type="radio"]:checked::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 10px;
    height: 10px;
    background: var(--orange-500);
    border-radius: 50%;
}

.checkbox-label input[type="checkbox"]:checked::after {
    content: '';
    position: absolute;
    top: 45%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(45deg);
    width: 5px;
    height: 10px;
    border: solid var(--orange-500);
    border-width: 0 2px 2px 0;
}

.radio-label:has(input:checked), .checkbox-label:has(input:checked) {
    border-color: var(--orange-500);
    background: rgba(255, 107, 0, 0.06);
}

.form-privacy {
    text-align: center;
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 14px;
}

/* Success */
.form-success {
    display: none;
    text-align: center;
    padding: 48px 32px;
    background: var(--grad-card);
    border: 1px solid var(--border-orange);
    border-radius: var(--radius-xl);
}

.form-success.show {
    display: block;
    animation: fadeInUp 0.5s var(--ease);
}

.success-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto 20px;
    background: rgba(255, 107, 0, 0.08);
    border: 2px solid var(--orange-500);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--orange-500);
}
.success-icon svg { width: 32px; height: 32px; }

.form-success h3 {
    font-size: 22px;
    font-weight: 800;
    color: var(--orange-400);
    margin-bottom: 10px;
}

.form-success p {
    font-size: 15px;
    color: var(--text-muted);
    line-height: 1.7;
}

/* === FOOTER === */
.footer {
    padding: 56px 0 0;
    background: var(--black-900);
    border-top: 1px solid var(--border);
}

.footer-top {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 40px;
}

.footer-brand p {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.8;
    margin-top: 14px;
    max-width: 300px;
}

.footer-col h4 {
    font-size: 13px;
    font-weight: 800;
    margin-bottom: 14px;
    color: var(--text-white);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.footer-col li {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 8px;
}
.footer-col li strong { color: var(--text-light); }
.footer-col a { font-size: 14px; color: var(--text-muted); }
.footer-col a:hover { color: var(--orange-400); }

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 0;
    border-top: 1px solid var(--border);
    font-size: 13px;
    color: var(--text-muted);
}

.footer-links-bottom { display: flex; gap: 20px; }
.footer-links-bottom a { color: var(--text-muted); font-size: 13px; }
.footer-links-bottom a:hover { color: var(--orange-400); }

/* === FLOATING BUTTONS === */
.floating-buttons {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 999;
    display: flex;
    flex-direction: column;
    gap: 12px;
    opacity: 0;
    transform: translateY(20px);
    transition: all var(--t-base);
}
.floating-buttons.visible {
    opacity: 1;
    transform: translateY(0);
}

.float-btn {
    width: 54px;
    height: 54px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    box-shadow: var(--shadow-card);
    transition: all var(--t-base);
}
.float-btn:hover { transform: scale(1.12); }

.call-btn {
    background: var(--grad-orange);
    color: #000;
    animation: pulse-ring 2s infinite;
}
.call-btn svg { width: 22px; height: 22px; }

.zalo-btn {
    background: #0068ff;
    color: #fff;
}
.zalo-text {
    font-weight: 800;
    font-size: 13px;
    letter-spacing: -0.5px;
}

/* === RESPONSIVE === */
@media (max-width: 1024px) {
    :root { --section-py: 80px; }
    .register-layout { grid-template-columns: 1fr; gap: 48px; }
    .footer-top { grid-template-columns: 1fr 1fr; }
    .proof-stats { padding: 32px 24px; }
}

@media (max-width: 768px) {
    :root { --section-py: 64px; }
    .nav-links, .nav-cta { display: none; }
    .mobile-toggle { display: flex; }
    .nav-links.active {
        display: flex;
        flex-direction: column;
        position: fixed;
        inset: 0;
        background: rgba(5, 5, 5, 0.98);
        backdrop-filter: blur(20px);
        align-items: center;
        justify-content: center;
        gap: 8px;
        z-index: 1000;
    }
    .nav-links.active a {
        font-size: 20px;
        padding: 16px 32px;
        color: var(--text-white);
    }
    .mobile-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
    .mobile-toggle.active span:nth-child(2) { opacity: 0; }
    .mobile-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

    .hero-title { font-size: clamp(30px, 8vw, 48px); }
    .hero-glow-orb { width: 250px; height: 250px; right: -30px; top: 5%; }
    .pain-grid, .solution-grid { grid-template-columns: 1fr; }
    .proof-stats { flex-direction: column; gap: 24px; padding: 28px 24px; }
    .proof-stat-divider { width: 80%; height: 1px; }
    .testimonial-block { padding: 32px 24px; }
    .register-guarantees { grid-template-columns: 1fr; }
    .register-form { padding: 28px 20px; }
    .footer-top { grid-template-columns: 1fr; }
    .footer-bottom { flex-direction: column; gap: 10px; text-align: center; }
    .process-step { gap: 20px; }
    .step-num { width: 48px; height: 48px; font-size: 18px; }
    .timeline-line { left: 23px; }
    .section-header { margin-bottom: 40px; }
}

@media (max-width: 480px) {
    .container { padding: 0 16px; }
    .section-title { font-size: clamp(24px, 6.5vw, 32px); }
    .hero { padding: 100px 0 60px; }
    .floating-buttons { bottom: 16px; right: 16px; }
    .float-btn { width: 48px; height: 48px; }
    .proof-stat-number { font-size: 36px; }
    .stat-plus { font-size: 22px; }
}

/* === MOBILE STICKY CTA BAR === */
.mobile-cta-bar {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 12px 16px;
    padding-bottom: calc(12px + env(safe-area-inset-bottom, 0px));
    background: rgba(5, 5, 5, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 1px solid var(--border-orange);
    box-shadow: 0 -4px 30px rgba(255, 107, 0, 0.15);
    transform: translateY(100%);
    transition: transform 0.4s var(--ease);
}

.mobile-cta-bar.visible {
    transform: translateY(0);
}

.mobile-cta-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;
    padding: 16px 24px;
    background: var(--grad-orange);
    color: #000 !important;
    font-family: 'Inter', sans-serif;
    font-size: 15px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 1px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-orange-lg);
    transition: all var(--t-base) var(--ease);
    text-decoration: none;
    animation: cta-glow-pulse 2s ease-in-out infinite;
}

.mobile-cta-btn svg {
    flex-shrink: 0;
}

.mobile-cta-btn:active {
    transform: scale(0.97);
    filter: brightness(0.95);
}

@keyframes cta-glow-pulse {
    0%, 100% { box-shadow: 0 4px 30px rgba(255, 107, 0, 0.3); }
    50% { box-shadow: 0 4px 50px rgba(255, 107, 0, 0.55); }
}

/* Show mobile CTA bar only on mobile */
@media (max-width: 768px) {
    .mobile-cta-bar {
        display: block;
    }
    /* Push floating buttons up to avoid overlap with CTA bar */
    .floating-buttons {
        bottom: 90px;
    }
    .floating-buttons.visible + .mobile-cta-bar {
        transform: translateY(0);
    }
    /* Give extra bottom padding to footer so content isn't hidden */
    .footer {
        padding-bottom: 80px;
    }
}

@media (max-width: 480px) {
    .floating-buttons {
        bottom: 85px;
        right: 12px;
    }
    .mobile-cta-btn {
        padding: 14px 20px;
        font-size: 14px;
    }
}