/* ============================================
   BuffBuddy — Landing Page
   ============================================ */

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

/* --- Design Tokens --- */
:root {
    --accent:         #FFAA10;
    --bg:             #0B0C0B;
    --bg-surface:     #111211;
    --bg-card:        #181818;
    --bg-card-hover:  #1e1e1e;
    --border:         #242424;
    --border-subtle:  #1c1c1c;
    --text-1:         #F0F0F0;
    --text-2:         #A8A8A8;
    --text-3:         #5a5a5a;
    --font:           'Montserrat', -apple-system, BlinkMacSystemFont, sans-serif;
    --ease-out:       cubic-bezier(0.16, 1, 0.3, 1);
    --ease-in-out:    cubic-bezier(0.4, 0, 0.2, 1);
    --radius-sm:      6px;
    --radius-md:      12px;
    --radius-lg:      20px;
}

/* --- Base --- */
html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    background-color: var(--bg);
    color: var(--text-1);
    font-family: var(--font);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

img {
    display: block;
    max-width: 100%;
    height: auto;
}

a {
    color: inherit;
    text-decoration: none;
}

/* --- Scroll Animation Base --- */
[data-animate] {
    opacity: 0;
    transform: translateY(28px);
    transition:
        opacity 0.7s var(--ease-out),
        transform 0.7s var(--ease-out);
}

[data-animate].visible {
    opacity: 1;
    transform: none;
}

[data-animate-delay="1"] { transition-delay: 0.1s; }
[data-animate-delay="2"] { transition-delay: 0.2s; }
[data-animate-delay="3"] { transition-delay: 0.3s; }
[data-animate-delay="4"] { transition-delay: 0.4s; }
[data-animate-delay="5"] { transition-delay: 0.5s; }

/* ============================================
   NAVIGATION
   ============================================ */
#nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 clamp(1.25rem, 4vw, 3rem);
    transition: background 0.4s var(--ease-in-out), border-color 0.4s var(--ease-in-out);
    border-bottom: 1px solid transparent;
}

#nav.scrolled {
    background: rgba(11, 12, 11, 0.93);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom-color: var(--border-subtle);
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-1);
    letter-spacing: -0.01em;
}

.nav-logo img {
    height: 28px;
    width: auto;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2.25rem;
    list-style: none;
}

.nav-links a {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-2);
    letter-spacing: 0.02em;
    transition: color 0.2s;
}

.nav-links a:hover {
    color: var(--text-1);
}

.nav-download {
    background: var(--accent);
    color: #000 !important;
    font-weight: 700 !important;
    padding: 0.45rem 1.1rem;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    transition: opacity 0.2s !important;
    letter-spacing: 0.01em;
}

.nav-download:hover {
    opacity: 0.88;
}

/* ============================================
   HERO
   ============================================ */
#hero {
    min-height: 100svh;
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 4rem;
    padding: 96px clamp(1.25rem, 4vw, 3rem) 64px;
    max-width: 1200px;
    margin: 0 auto;
}

.hero-copy {
    max-width: 560px;
}

.hero-eyebrow {
    display: inline-block;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-3);
    margin-bottom: 1.25rem;
}

.hero-h1 {
    font-size: clamp(2.6rem, 5.5vw, 4.2rem);
    font-weight: 800;
    line-height: 1.05;
    letter-spacing: -0.035em;
    color: var(--text-1);
    margin-bottom: 1.5rem;
}

.hero-h1 span {
    color: var(--accent);
}

.hero-lead {
    font-size: clamp(0.95rem, 1.6vw, 1.05rem);
    color: var(--text-2);
    line-height: 1.75;
    margin-bottom: 2.25rem;
    font-weight: 400;
    max-width: 460px;
}

.store-row {
    display: flex;
    gap: 0.875rem;
    flex-wrap: wrap;
    margin-bottom: 1.25rem;
}

.store-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--bg-card);
    border: 1px solid #333;
    border-radius: 10px;
    padding: 0.7rem 1.3rem;
    color: var(--text-1);
    transition: background 0.2s, border-color 0.2s, transform 0.15s;
    cursor: pointer;
}

.store-btn:hover {
    background: var(--bg-card-hover);
    border-color: #444;
    transform: translateY(-1px);
}

.store-btn:active {
    transform: none;
}

.store-btn svg {
    width: 20px;
    height: 20px;
    fill: var(--text-1);
    flex-shrink: 0;
}

.store-btn-text .store-line1 {
    display: block;
    font-size: 0.62rem;
    color: var(--text-3);
    text-transform: uppercase;
    letter-spacing: 0.07em;
    line-height: 1;
    margin-bottom: 2px;
}

.store-btn-text .store-line2 {
    display: block;
    font-size: 0.9rem;
    font-weight: 700;
    line-height: 1;
}

.hero-microcopy {
    font-size: 0.75rem;
    color: var(--text-3);
    font-weight: 400;
}

/* --- Phone Mockup --- */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.phone-wrap {
    position: relative;
    width: 260px;
}

.phone-outer {
    background: #141414;
    border: 1.5px solid #2a2a2a;
    border-radius: 44px;
    padding: 14px 11px 18px;
    position: relative;
}

.phone-notch {
    width: 72px;
    height: 8px;
    background: #1e1e1e;
    border-radius: 4px;
    margin: 0 auto 12px;
}

.phone-screen {
    border-radius: 28px;
    overflow: hidden;
    width: 100%;
    aspect-ratio: 9 / 19.5;
    background: var(--bg);
}

.phone-screen img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top center;
}

/* Side buttons */
.phone-outer::before {
    content: '';
    position: absolute;
    right: -3px;
    top: 88px;
    width: 2.5px;
    height: 52px;
    background: #2a2a2a;
    border-radius: 2px;
}

.phone-outer::after {
    content: '';
    position: absolute;
    left: -3px;
    top: 78px;
    width: 2.5px;
    height: 32px;
    background: #2a2a2a;
    border-radius: 2px;
}

/* ============================================
   TRUST BAR
   ============================================ */
#trust {
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    background: var(--bg-surface);
}

.trust-inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 clamp(1.25rem, 4vw, 3rem);
    display: grid;
    grid-template-columns: repeat(4, 1fr);
}

.trust-item {
    padding: 1.5rem 1rem;
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 4px;
}

.trust-item:last-child {
    border-right: none;
}

.trust-value {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-1);
    letter-spacing: -0.02em;
}

.trust-label {
    font-size: 0.72rem;
    color: var(--text-3);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.07em;
}

/* ============================================
   PROBLEM SECTION
   ============================================ */
#problem {
    padding: clamp(72px, 10vw, 120px) clamp(1.25rem, 4vw, 3rem);
    max-width: 820px;
    margin: 0 auto;
    text-align: center;
}

.problem-kicker {
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-3);
    margin-bottom: 1.5rem;
    display: block;
}

.problem-h2 {
    font-size: clamp(1.9rem, 4vw, 3rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 1.75rem;
    color: var(--text-1);
}

.problem-body {
    font-size: clamp(0.95rem, 1.5vw, 1.05rem);
    color: var(--text-2);
    line-height: 1.8;
    max-width: 620px;
    margin: 0 auto 1.25rem;
    font-weight: 400;
}

/* ============================================
   FEATURE ROWS
   ============================================ */
.feature-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 6rem;
    max-width: 1100px;
    margin: 0 auto;
    padding: clamp(64px, 8vw, 96px) clamp(1.25rem, 4vw, 3rem);
    border-top: 1px solid var(--border);
}

.feature-row.flip {
    direction: rtl;
}

.feature-row.flip > * {
    direction: ltr;
}

.feature-image-wrap {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border);
    aspect-ratio: 4 / 3;
    background: var(--bg-card);
}

.feature-image-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: brightness(0.75) saturate(0.9);
    transition: filter 0.4s;
}

.feature-image-wrap:hover img {
    filter: brightness(0.88) saturate(1);
}

.feature-text-wrap {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.feature-num {
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-3);
    margin-bottom: 1.25rem;
}

.feature-h3 {
    font-size: clamp(1.5rem, 2.5vw, 2rem);
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.025em;
    color: var(--text-1);
    margin-bottom: 1.25rem;
}

.feature-h3 strong {
    color: var(--accent);
    font-weight: 800;
}

.feature-body {
    font-size: 0.95rem;
    color: var(--text-2);
    line-height: 1.8;
    margin-bottom: 1rem;
}

.feature-body + .feature-body {
    margin-top: 0;
}

.feature-detail {
    margin-top: 1.25rem;
    padding-top: 1.25rem;
    border-top: 1px solid var(--border-subtle);
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.feature-detail-item {
    display: flex;
    align-items: baseline;
    gap: 0.75rem;
    font-size: 0.875rem;
    color: var(--text-2);
    line-height: 1.5;
}

.feature-detail-item::before {
    content: '';
    display: inline-block;
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--accent);
    flex-shrink: 0;
    position: relative;
    top: -2px;
}

/* ============================================
   SOCIAL MOCK VISUAL (Feature 3)
   ============================================ */
.feature-image-social {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    background: var(--bg-card);
}

.social-mock {
    width: 100%;
    max-width: 320px;
    background: var(--bg-card2);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
    font-family: var(--font);
}

.social-mock-header {
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-3);
    padding: 1rem 1.25rem 0.75rem;
    border-bottom: 1px solid var(--border);
}

.social-mock-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.875rem 1.25rem;
    border-bottom: 1px solid var(--border-subtle);
}

.social-mock-item.muted {
    opacity: 0.5;
}

.mock-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: #2a2a2a;
    border: 1px solid #333;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.65rem;
    font-weight: 700;
    color: var(--text-2);
    flex-shrink: 0;
    letter-spacing: 0.02em;
}

.mock-info {
    flex: 1;
    min-width: 0;
}

.mock-name {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-1);
    margin-bottom: 2px;
}

.mock-activity {
    font-size: 0.7rem;
    color: var(--text-3);
}

.mock-badge {
    font-size: 0.6rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    background: rgba(255,170,16,0.12);
    color: var(--accent);
    border: 1px solid rgba(255,170,16,0.25);
    border-radius: 4px;
    padding: 2px 6px;
    flex-shrink: 0;
}

.social-mock-divider {
    height: 1px;
    background: var(--border);
    margin: 0;
}

.social-mock-cta {
    padding: 0.875rem 1.25rem;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent);
    text-align: center;
    letter-spacing: 0.01em;
}

/* ============================================
   STATS SECTION
   ============================================ */
#stats {
    background: var(--bg-surface);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    padding: clamp(56px, 7vw, 80px) clamp(1.25rem, 4vw, 3rem);
}

.stats-inner {
    max-width: 1100px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 5rem;
    align-items: center;
}

.stats-copy h2 {
    font-size: clamp(1.5rem, 2.5vw, 2rem);
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -0.025em;
    margin-bottom: 0.75rem;
}

.stats-copy p {
    font-size: 0.9rem;
    color: var(--text-2);
    line-height: 1.7;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 1.5rem;
}

.stat-num {
    font-size: clamp(1.4rem, 2.2vw, 1.8rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--accent);
    line-height: 1;
    margin-bottom: 0.6rem;
}

.stat-desc {
    font-size: 0.78rem;
    color: var(--text-2);
    font-weight: 400;
    line-height: 1.55;
}

/* ============================================
   SUMMARY SECTION
   ============================================ */
#summary {
    padding: clamp(80px, 10vw, 120px) clamp(1.25rem, 4vw, 3rem);
    max-width: 880px;
    margin: 0 auto;
    text-align: center;
    border-top: 1px solid var(--border);
}

.summary-h2 {
    font-size: clamp(1.9rem, 4vw, 2.8rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 1.25rem;
}

.summary-body {
    font-size: clamp(0.9rem, 1.4vw, 1rem);
    color: var(--text-2);
    line-height: 1.8;
    max-width: 560px;
    margin: 0 auto 2.5rem;
}

/* Post-workout summary card */
.summary-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 2rem 2.5rem;
    display: inline-grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0;
    text-align: center;
    min-width: 420px;
}

.summary-stat {
    padding: 1rem 1.5rem;
    border-right: 1px solid var(--border);
}

.summary-stat:last-child {
    border-right: none;
}

.summary-stat .num {
    font-size: 2rem;
    font-weight: 800;
    color: var(--accent);
    letter-spacing: -0.04em;
    line-height: 1;
    margin-bottom: 0.35rem;
}

.summary-stat .lbl {
    font-size: 0.7rem;
    color: var(--text-3);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.summary-sub {
    margin-top: 1.25rem;
    font-size: 0.78rem;
    color: var(--text-3);
    font-style: italic;
}

/* ============================================
   FINAL DOWNLOAD CTA
   ============================================ */
#download {
    background: var(--bg-surface);
    border-top: 1px solid var(--border);
    padding: clamp(80px, 10vw, 120px) clamp(1.25rem, 4vw, 3rem);
    text-align: center;
}

.download-inner {
    max-width: 620px;
    margin: 0 auto;
}

.download-kicker {
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-3);
    margin-bottom: 1.5rem;
    display: block;
}

.download-h2 {
    font-size: clamp(2rem, 4.5vw, 3.2rem);
    font-weight: 800;
    line-height: 1.05;
    letter-spacing: -0.035em;
    margin-bottom: 1rem;
}

.download-sub {
    font-size: 0.95rem;
    color: var(--text-2);
    line-height: 1.7;
    margin-bottom: 2.5rem;
}

.download-badges {
    display: flex;
    justify-content: center;
    gap: 0.875rem;
    flex-wrap: wrap;
    margin-bottom: 1.25rem;
}

.download-note {
    font-size: 0.75rem;
    color: var(--text-3);
}

/* ============================================
   FOOTER
   ============================================ */
#footer {
    background: var(--bg);
    border-top: 1px solid var(--border-subtle);
    padding: 2rem clamp(1.25rem, 4vw, 3rem);
}

.footer-inner {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text-2);
}

.footer-logo img {
    height: 22px;
    width: auto;
    opacity: 0.7;
}

.footer-links {
    display: flex;
    gap: 1.75rem;
    list-style: none;
}

.footer-links a {
    font-size: 0.75rem;
    color: var(--text-3);
    transition: color 0.2s;
}

.footer-links a:hover {
    color: var(--text-2);
}

.footer-copy {
    font-size: 0.72rem;
    color: var(--text-3);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 960px) {
    #hero {
        grid-template-columns: 1fr;
        text-align: center;
        padding-top: 88px;
        padding-bottom: 56px;
        gap: 3rem;
    }

    .hero-copy {
        max-width: 100%;
    }

    .hero-lead {
        max-width: 100%;
        margin-left: auto;
        margin-right: auto;
    }

    .store-row {
        justify-content: center;
    }

    .hero-visual {
        order: -1;
    }

    .phone-wrap {
        width: 200px;
    }

    .feature-row {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }

    .feature-row.flip {
        direction: ltr;
    }

    .stats-inner {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }

    .stats-copy {
        text-align: center;
    }

    .stats-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .trust-inner {
        grid-template-columns: repeat(2, 1fr);
    }

    .trust-item:nth-child(2) {
        border-right: none;
    }

    .trust-item:nth-child(3) {
        border-top: 1px solid var(--border);
    }

    .trust-item:nth-child(4) {
        border-top: 1px solid var(--border);
        border-right: none;
    }
}

@media (max-width: 640px) {
    .nav-links {
        display: none;
    }

    .stats-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .summary-card {
        min-width: 0;
        width: 100%;
        grid-template-columns: 1fr;
        padding: 1.5rem;
    }

    .summary-stat {
        border-right: none;
        border-bottom: 1px solid var(--border);
        padding: 1rem;
    }

    .summary-stat:last-child {
        border-bottom: none;
    }

    .footer-inner {
        flex-direction: column;
        align-items: flex-start;
    }

    .trust-inner {
        grid-template-columns: 1fr 1fr;
    }
}