/* ========================================
   VEXA Landing — Dark + Emerald Theme
   Mobile-first responsive
   ======================================== */

/* --- RESET & BASE --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --bg:          #0f172a;
    --bg-alt:      #1e293b;
    --bg-card:     #1e293b;
    --bg-card-hover: #263548;
    --border:      #334155;
    --text:        #e2e8f0;
    --text-muted:  #94a3b8;
    --text-dim:    #64748b;
    --accent:      #10b981;
    --accent-hover:#059669;
    --accent-glow: rgba(16, 185, 129, 0.15);
    --amber:       #f59e0b;
    --amber-hover: #d97706;
    --red:         #ef4444;
    --radius:      12px;
    --radius-sm:   8px;
    --radius-lg:   20px;
    --font:        'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --container:   1200px;
    --nav-h:       64px;
}

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); }
strong { font-weight: 600; }

/* --- CONTAINER --- */
.container { max-width: var(--container); margin: 0 auto; padding: 0 20px; }
.container--narrow { max-width: 800px; }

/* --- NAV --- */
.nav {
    position: fixed; top: 0; left: 0; right: 0; z-index: 100;
    background: rgba(15, 23, 42, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    height: var(--nav-h);
    transition: background .3s;
}
.nav__inner {
    display: flex; align-items: center; justify-content: space-between;
    height: var(--nav-h);
}
.nav__logo {
    font-size: 1.5rem; font-weight: 800; color: var(--accent);
    letter-spacing: -0.02em;
}
.nav__links { display: none; gap: 32px; }
.nav__links a { color: var(--text-muted); font-size: .875rem; font-weight: 500; }
.nav__links a:hover { color: var(--text); }
.nav > .container > .btn { display: none; }
.nav__burger {
    display: flex; flex-direction: column; gap: 5px;
    background: none; border: none; cursor: pointer; padding: 8px;
}
.nav__burger span {
    width: 22px; height: 2px; background: var(--text); border-radius: 2px;
    transition: .3s;
}
.nav__mobile {
    display: none; flex-direction: column; gap: 16px;
    padding: 20px; background: var(--bg-alt);
    border-bottom: 1px solid var(--border);
}
.nav__mobile.open { display: flex; }
.nav__mobile a { color: var(--text-muted); font-size: .95rem; }

@media (min-width: 768px) {
    .nav__links { display: flex; }
    .nav > .container > .btn { display: inline-flex; }
    .nav__burger { display: none; }
    .nav__mobile { display: none !important; }
}

/* --- BUTTONS --- */
.btn {
    display: inline-flex; align-items: center; justify-content: center;
    padding: 12px 28px; border-radius: var(--radius-sm);
    font-weight: 600; font-size: .95rem; cursor: pointer;
    border: none; transition: all .2s;
    text-align: center; line-height: 1.4;
}
.btn--primary { background: var(--accent); color: #fff; }
.btn--primary:hover { background: var(--accent-hover); color: #fff; transform: translateY(-1px); }
.btn--accent { background: var(--amber); color: #000; }
.btn--accent:hover { background: var(--amber-hover); color: #000; }
.btn--outline {
    background: transparent; color: var(--accent);
    border: 1.5px solid var(--accent);
}
.btn--outline:hover { background: var(--accent); color: #fff; }
.btn--ghost { background: transparent; color: var(--text-muted); border: 1.5px solid var(--border); }
.btn--ghost:hover { border-color: var(--text-muted); color: var(--text); }
.btn--lg { padding: 16px 36px; font-size: 1.05rem; }
.btn--sm { padding: 8px 18px; font-size: .85rem; }
.btn--block { width: 100%; }

/* --- HERO --- */
.hero {
    position: relative; overflow: hidden;
    padding: calc(var(--nav-h) + 60px) 0 80px;
    text-align: center;
}
.hero__badge {
    display: inline-block;
    padding: 6px 16px; border-radius: 100px;
    background: var(--accent-glow);
    color: var(--accent); font-size: .8rem; font-weight: 600;
    border: 1px solid rgba(16, 185, 129, 0.3);
    margin-bottom: 24px;
    letter-spacing: 0.05em; text-transform: uppercase;
}
.hero__title {
    font-size: clamp(1.8rem, 5vw, 3.2rem);
    font-weight: 800; line-height: 1.15;
    margin-bottom: 20px; letter-spacing: -0.03em;
}
.text-gradient {
    background: linear-gradient(135deg, var(--accent), #22d3ee);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero__sub {
    font-size: clamp(1rem, 2.5vw, 1.25rem);
    color: var(--text-muted); margin-bottom: 16px; max-width: 600px; margin-left: auto; margin-right: auto;
}
.hero__desc {
    font-size: .95rem; color: var(--text-dim);
    max-width: 640px; margin: 0 auto 32px; line-height: 1.7;
}
.hero__cta { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; margin-bottom: 16px; }
.hero__note { font-size: .8rem; color: var(--text-dim); }
.hero__glow {
    position: absolute; top: -200px; left: 50%; transform: translateX(-50%);
    width: 600px; height: 600px; border-radius: 50%;
    background: radial-gradient(circle, rgba(16,185,129,.08) 0%, transparent 70%);
    pointer-events: none;
}

/* --- SECTIONS --- */
.section { padding: 80px 0; }
.section--alt { background: var(--bg-alt); }
.section__title {
    font-size: clamp(1.5rem, 4vw, 2.2rem);
    font-weight: 800; text-align: center;
    margin-bottom: 32px; letter-spacing: -0.02em;
}
.section__sub {
    text-align: center; color: var(--text-muted);
    margin-bottom: 48px; font-size: 1rem; max-width: 600px; margin-left: auto; margin-right: auto;
}
.section__cta { text-align: center; margin-top: 48px; }

/* --- TEXT BLOCKS --- */
.text-block p { margin-bottom: 16px; color: var(--text-muted); line-height: 1.7; }
.text-accent { color: var(--accent) !important; font-weight: 600; }
.story p { margin-bottom: 16px; color: var(--text-muted); line-height: 1.7; }

/* --- SEGMENTS --- */
.segments { display: grid; gap: 16px; }
.segment-card {
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 24px;
    transition: border-color .2s;
}
.segment-card:hover { border-color: var(--accent); }
.segment-card__icon { font-size: 1.5rem; margin-bottom: 12px; }
.segment-card p { color: var(--text-muted); font-size: .93rem; line-height: 1.6; }
@media (min-width: 768px) { .segments { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .segments { grid-template-columns: repeat(3, 1fr); } }

/* --- COMPARISON --- */
.comparison { display: grid; gap: 16px; margin-top: 48px; }
.comparison__col {
    background: var(--bg-card); border-radius: var(--radius);
    padding: 28px; border: 1px solid var(--border);
}
.comparison__col h3 { font-size: 1.1rem; margin-bottom: 16px; }
.comparison__col ul { list-style: none; }
.comparison__col li { padding: 8px 0; font-size: .93rem; color: var(--text-muted); border-bottom: 1px solid rgba(51,65,85,.4); }
.comparison__col li:last-child { border-bottom: none; }
.comparison__col--before h3 { color: var(--red); }
.comparison__col--before li::before { content: '- '; color: var(--red); }
.comparison__col--after h3 { color: var(--accent); }
.comparison__col--after li::before { content: '+ '; color: var(--accent); }
@media (min-width: 768px) { .comparison { grid-template-columns: 1fr 1fr; } }

/* --- PROBLEMS --- */
.problems { display: grid; gap: 16px; }
.problem-card {
    background: var(--bg); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 28px;
    position: relative;
}
.problem-card__num {
    font-size: 2.5rem; font-weight: 800;
    color: rgba(239, 68, 68, 0.35); position: absolute; top: 16px; right: 20px;
}
.problem-card h3 { font-size: 1.05rem; margin-bottom: 8px; }
.problem-card p { color: var(--text-muted); font-size: .93rem; }
@media (min-width: 768px) { .problems { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .problems { grid-template-columns: repeat(3, 1fr); } }

/* --- SOLUTIONS --- */
.solutions { display: flex; flex-direction: column; gap: 16px; max-width: 800px; margin: 0 auto; }
.solution-row {
    display: grid; grid-template-columns: 1fr auto 1fr; gap: 16px; align-items: center;
    background: var(--bg-card); border-radius: var(--radius);
    padding: 20px 24px; border: 1px solid var(--border);
}
.solution-row__problem { color: var(--text-muted); font-size: 1rem; font-weight: 600; }
.solution-row__arrow { color: var(--accent); font-size: 1.3rem; font-weight: 700; }
.solution-row__answer { color: var(--text); font-size: .9rem; }
@media (max-width: 600px) {
    .solution-row { grid-template-columns: 1fr; gap: 8px; text-align: center; }
    .solution-row__arrow { display: none; }
}

/* --- STEPS --- */
.steps { display: grid; gap: 24px; counter-reset: step; }
.step {
    background: var(--bg); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 28px;
    position: relative;
}
.step__num {
    display: inline-flex; align-items: center; justify-content: center;
    width: 40px; height: 40px; border-radius: 50%;
    background: var(--accent); color: #fff;
    font-weight: 700; font-size: 1.1rem; margin-bottom: 16px;
}
.step__title { font-size: 1.1rem; margin-bottom: 8px; }
.step p { color: var(--text-muted); font-size: .93rem; margin-bottom: 12px; }
.step__result {
    font-size: .85rem; color: var(--accent);
    padding: 8px 12px; background: var(--accent-glow);
    border-radius: var(--radius-sm); border: 1px solid rgba(16,185,129,.2);
}
@media (min-width: 768px) { .steps { grid-template-columns: repeat(2, 1fr); } }

/* --- SKILLS GRID --- */
.skills-grid { display: grid; gap: 32px; }
.skill-category__title {
    font-size: 1.1rem; color: var(--accent);
    margin-bottom: 16px; padding-bottom: 8px;
    border-bottom: 1px solid var(--border);
}
.skill-item { margin-bottom: 16px; }
.skill-item strong { font-size: .95rem; }
.skill-item p { color: var(--text-muted); font-size: .87rem; margin-top: 4px; }
@media (min-width: 768px) { .skills-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .skills-grid { grid-template-columns: repeat(3, 1fr); } }

/* --- RESULTS --- */
.results-grid { display: grid; gap: 16px; }
.result-card {
    background: var(--bg); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 24px; text-align: center;
}
.result-card__metric {
    font-size: 1.6rem; font-weight: 800; color: var(--accent);
    margin-bottom: 8px;
}
.result-card p { color: var(--text-muted); font-size: .9rem; }
@media (min-width: 768px) { .results-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .results-grid { grid-template-columns: repeat(3, 1fr); } }

/* --- AUTHOR --- */
.author { display: flex; flex-direction: column; gap: 32px; margin-top: 32px; }
.author__photo { flex-shrink: 0; }
.author__placeholder {
    width: 100px; height: 100px; border-radius: 50%;
    background: var(--accent-glow); border: 2px solid var(--accent);
    display: flex; align-items: center; justify-content: center;
    font-size: 1.5rem; font-weight: 800; color: var(--accent);
    margin: 0 auto;
}
.author__facts { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-bottom: 20px; }
.author__fact {
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius-sm); padding: 12px;
    font-size: .85rem; color: var(--text-muted);
}
.author__fact span { display: block; font-size: 1.1rem; font-weight: 700; color: var(--accent); }
.author__bio p { color: var(--text-muted); margin-bottom: 12px; font-size: .93rem; }
@media (min-width: 768px) {
    .author { flex-direction: row; align-items: flex-start; }
    .author__placeholder { margin: 0; }
}

/* --- DEMOS --- */
.demos { display: grid; gap: 16px; }
.demo-card {
    background: var(--bg); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 24px;
}
.demo-card__label {
    font-size: .8rem; font-weight: 600; color: var(--accent);
    text-transform: uppercase; letter-spacing: .05em; margin-bottom: 16px;
}
.demo-card__mock {
    background: #0b1120; border-radius: var(--radius-sm);
    padding: 20px; margin-bottom: 16px;
}
.demo-line {
    height: 10px; background: #1e293b; border-radius: 4px;
    margin-bottom: 8px;
}
.demo-line--title { width: 60%; height: 14px; background: #334155; margin-bottom: 16px; }
.demo-line--short { width: 45%; }
.demo-line--accent { background: rgba(16,185,129,.2); }
.demo-card p { color: var(--text-muted); font-size: .87rem; }
@media (min-width: 768px) { .demos { grid-template-columns: repeat(3, 1fr); } }

/* --- PRICING --- */
.pricing-grid { display: grid; gap: 20px; margin-bottom: 40px; }
.price-card {
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius-lg); padding: 32px;
    position: relative; display: flex; flex-direction: column;
}
.price-card--featured {
    border-color: var(--accent);
    box-shadow: 0 0 40px rgba(16,185,129,.1);
}
.price-card__badge {
    position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
    background: var(--amber); color: #000;
    font-size: .75rem; font-weight: 700;
    padding: 4px 16px; border-radius: 100px;
    text-transform: uppercase; letter-spacing: .05em;
}
.price-card__badge--free {
    background: var(--accent); color: #fff;
}
.price-card__header { margin-bottom: 12px; }
.price-card__header h3 { font-size: 1.1rem; color: var(--text-muted); margin-bottom: 4px; }
.price-card__price { font-size: 2.2rem; font-weight: 800; }
.price-card__price span { font-size: 1rem; font-weight: 400; color: var(--text-muted); }
.price-card--featured .price-card__price { color: var(--accent); }
.price-card__desc { color: var(--text-muted); font-size: .9rem; margin-bottom: 20px; }
.price-card__features { list-style: none; margin-bottom: 20px; flex-grow: 1; }
.price-card__features li {
    padding: 6px 0; font-size: .87rem; color: var(--text-muted);
    padding-left: 24px; position: relative;
}
.price-card__features li::before {
    content: '\2713'; position: absolute; left: 0;
    color: var(--accent); font-weight: 700;
}
.price-card__value {
    font-size: .8rem; color: var(--text-dim);
    padding: 8px 0; margin-bottom: 8px; border-top: 1px solid var(--border);
}
.price-card__guarantee {
    font-size: .8rem; color: var(--accent); margin-bottom: 16px;
}
@media (min-width: 768px) { .pricing-grid { grid-template-columns: repeat(2, 1fr); align-items: start; } }
@media (min-width: 1024px) { .pricing-grid--4 { grid-template-columns: repeat(4, 1fr); } }

/* --- SETUP CARD --- */
.setup-card {
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius-lg); padding: 32px;
}
.setup-card__inner { display: flex; flex-direction: column; gap: 24px; }
.setup-card h3 { font-size: 1.3rem; margin-bottom: 8px; }
.setup-card p { color: var(--text-muted); font-size: .93rem; }
.setup-card__includes {
    display: flex; flex-wrap: wrap; gap: 8px; margin: 16px 0;
}
.setup-card__includes span {
    padding: 4px 12px; font-size: .8rem;
    background: var(--accent-glow); border: 1px solid rgba(16,185,129,.2);
    border-radius: 100px; color: var(--accent);
}
.setup-card__value { font-size: .85rem; color: var(--text-dim); margin-top: 8px; }
.setup-card__cta { text-align: center; }
.setup-card__note { font-size: .8rem; color: var(--text-dim); margin-top: 8px; }
@media (min-width: 768px) {
    .setup-card__inner { flex-direction: row; align-items: center; }
    .setup-card__text { flex: 1; }
    .setup-card__cta { flex-shrink: 0; }
}

/* --- FAQ --- */
.faq { display: flex; flex-direction: column; gap: 8px; margin-top: 32px; }
.faq__item { border-bottom: 1px solid var(--border); }
.faq__q {
    display: flex; align-items: center; justify-content: space-between;
    width: 100%; padding: 16px 0; background: none; border: none;
    color: var(--text); font-size: .95rem; font-weight: 600;
    cursor: pointer; text-align: left; font-family: var(--font);
}
.faq__q::after {
    content: '+'; font-size: 1.3rem; color: var(--accent);
    transition: transform .3s; flex-shrink: 0; margin-left: 16px;
}
.faq__item.open .faq__q::after { content: '-'; }
.faq__a {
    max-height: 0; overflow: hidden; transition: max-height .3s ease;
}
.faq__item.open .faq__a { max-height: 300px; }
.faq__a p { color: var(--text-muted); font-size: .9rem; padding-bottom: 16px; line-height: 1.6; }

/* --- URGENCY --- */
.section--urgent { background: linear-gradient(180deg, var(--bg) 0%, rgba(245,158,11,.05) 100%); }
.urgency-block { text-align: center; max-width: 600px; margin: 32px auto 0; }
.urgency-block p { color: var(--text-muted); margin-bottom: 12px; }
.urgency-block__features {
    display: flex; flex-wrap: wrap; gap: 8px; justify-content: center;
    margin: 24px 0;
}
.urgency-block__features span {
    padding: 6px 16px; font-size: .85rem;
    background: rgba(245,158,11,.1); border: 1px solid rgba(245,158,11,.25);
    border-radius: 100px; color: var(--amber);
}

/* --- NOT FOR --- */
.not-for-list { display: flex; flex-direction: column; gap: 16px; margin-top: 32px; }
.not-for-item {
    display: flex; gap: 16px; align-items: flex-start;
    background: var(--bg); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 20px;
}
.not-for-item__x {
    color: var(--red); font-size: 1.5rem; font-weight: 700;
    flex-shrink: 0; line-height: 1;
}
.not-for-item p { color: var(--text-muted); font-size: .9rem; }

/* --- FINAL --- */
.section--final {
    background: linear-gradient(180deg, var(--bg-alt) 0%, var(--bg) 100%);
    padding: 100px 0;
}
.final-block { text-align: center; margin-bottom: 48px; }
.final-block p { color: var(--text-muted); margin-bottom: 12px; font-size: 1.05rem; }
.final-cta { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; margin-bottom: 20px; }
.final-note { text-align: center; font-size: .8rem; color: var(--text-dim); }

/* --- FOOTER --- */
.footer {
    background: #0b1120; padding: 40px 0;
    border-top: 1px solid var(--border);
}
.footer__inner { text-align: center; }
.footer__logo {
    font-size: 1.3rem; font-weight: 800; color: var(--accent);
    margin-bottom: 16px;
}
.footer__links { display: flex; flex-wrap: wrap; gap: 20px; justify-content: center; margin-bottom: 16px; }
.footer__links a { color: var(--text-dim); font-size: .85rem; }
.footer__links a:hover { color: var(--text-muted); }
.footer__copy { color: var(--text-dim); font-size: .8rem; }

/* --- ANIMATIONS --- */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}
.fade-in {
    opacity: 0; transform: translateY(20px);
    transition: opacity .5s ease, transform .5s ease;
}
.fade-in.visible { opacity: 1; transform: translateY(0); }