/* --- Mia Design System (Dark Theme) --- */
@import url('../fonts.css');

:root {
    --mia-bg:            #0A0A0F;
    --mia-surface:       #1A1A24;
    --mia-surface-hi:    #252532;
    --mia-teal:          #4ECDC4;
    --mia-coral:         #FF6B6B;
    --mia-purple:        #A855F7;
    --mia-amber:         #F59E0B;
    --mia-text:          #FFFFFF;
    --mia-text-muted:    rgba(255,255,255,0.5);
    --mia-text-dim:      rgba(255,255,255,0.3);
    --mia-border:        rgba(255,255,255,0.07);

    --font-heading: 'Playfair Display', serif;
    --font-body:    'Inter', sans-serif;

    --rad-sm:   8px;
    --rad-md:   12px;
    --rad-lg:   20px;
    --rad-xl:   28px;
    --rad-full: 999px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
    font-size: 16px;
}

body.mia-page {
    background: var(--mia-bg);
    color: var(--mia-text);
    font-family: var(--font-body);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
    font-family: var(--font-heading);
    line-height: 1.15;
}

h1 { font-size: clamp(2.8rem, 6vw, 4.5rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: 1.25rem; font-family: var(--font-body); font-weight: 600; }

p {
    font-size: 1.05rem;
    color: var(--mia-text-muted);
    line-height: 1.7;
}

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

/* --- Navigation --- */
.mia-nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 32px;
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--mia-border);
}

.mia-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--mia-text);
    text-decoration: none;
}

.mia-logo-icon { font-size: 1.2rem; }

.mia-nav-links {
    display: flex;
    gap: 32px;
}

.mia-nav-links a {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--mia-text-muted);
    transition: color 0.25s;
}

.mia-nav-links a:hover { color: var(--mia-teal); }

.mia-nav-btn {
    padding: 10px 20px;
    border-radius: var(--rad-full);
    background: var(--mia-teal);
    color: var(--mia-bg);
    font-weight: 600;
    font-size: 0.875rem;
    transition: opacity 0.25s, transform 0.25s;
}

.mia-nav-btn:hover { opacity: 0.9; transform: translateY(-1px); }

/* Hamburger */
.mia-hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 101;
}

.mia-hamburger span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--mia-text);
    border-radius: 2px;
    transition: all 0.3s;
}

.mia-hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.mia-hamburger.active span:nth-child(2) { opacity: 0; }
.mia-hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* --- Back Button --- */
.mia-back-btn {
    position: fixed;
    top: 80px;
    left: 24px;
    z-index: 99;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: rgba(26, 26, 36, 0.9);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid var(--mia-border);
    border-radius: var(--rad-full);
    color: var(--mia-text-muted);
    font-size: 0.875rem;
    font-weight: 500;
    transition: color 0.25s, transform 0.25s, background 0.25s;
}

.mia-back-btn:hover {
    color: var(--mia-teal);
    background: rgba(78, 205, 196, 0.08);
    transform: translateX(-2px);
}

/* --- Glow effects --- */
.mia-glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    pointer-events: none;
    z-index: 0;
}

.mia-glow-teal {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(78, 205, 196, 0.12) 0%, transparent 70%);
    top: -100px;
    left: -100px;
}

.mia-glow-coral {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(255, 107, 107, 0.08) 0%, transparent 70%);
    bottom: -80px;
    right: -80px;
}

.mia-glow-center {
    width: 700px;
    height: 400px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: radial-gradient(ellipse, rgba(78, 205, 196, 0.08) 0%, transparent 70%);
}

/* --- Container --- */
.mia-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 32px;
}

/* --- Hero --- */
.mia-hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 140px 32px 80px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.mia-hero-content {
    position: relative;
    z-index: 1;
    max-width: 820px;
}

.mia-eyebrow {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--mia-text-muted);
    margin-bottom: 20px;
}

.mia-eyebrow-sm { justify-content: flex-start; font-size: 0.8rem; margin-bottom: 16px; }

.mia-badge {
    background: rgba(78, 205, 196, 0.1);
    border: 1px solid rgba(78, 205, 196, 0.2);
    color: var(--mia-teal);
    padding: 4px 12px;
    border-radius: var(--rad-full);
    font-size: 0.75rem;
}

.mia-badge-sep { color: var(--mia-text-dim); }

.mia-gradient-text {
    background: linear-gradient(135deg, var(--mia-teal), #3B82F6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.mia-hero h1 {
    margin-bottom: 24px;
}

.mia-hero-desc {
    font-size: 1.2rem;
    color: var(--mia-text-muted);
    max-width: 580px;
    margin: 0 auto 40px;
}

/* --- Hero App Icon --- */
.mia-app-icon-hero {
    width: 100px;
    height: 100px;
    border-radius: 22px;
    overflow: hidden;
    margin: 0 auto 28px;
    box-shadow:
        0 0 0 1px rgba(78, 205, 196, 0.15),
        0 8px 32px rgba(0, 0, 0, 0.4),
        0 0 60px rgba(78, 205, 196, 0.12);
}

.mia-app-icon-hero img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* --- Buttons --- */
.mia-hero-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}

.mia-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 28px;
    border-radius: var(--rad-full);
    font-size: 1rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.25s ease;
}

.mia-btn-primary {
    background: linear-gradient(135deg, var(--mia-teal), #3B82F6);
    color: #fff;
    box-shadow: 0 4px 24px rgba(78, 205, 196, 0.25);
}

.mia-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(78, 205, 196, 0.35);
}

.mia-btn-ghost {
    background: transparent;
    color: var(--mia-text-muted);
    border: 1px solid var(--mia-border);
}

.mia-btn-ghost:hover {
    color: var(--mia-text);
    border-color: rgba(255,255,255,0.15);
    background: rgba(255,255,255,0.04);
}

/* --- Hero Stats --- */
.mia-hero-stats {
    position: relative;
    z-index: 1;
    display: flex;
    gap: 16px;
    margin-top: 60px;
    flex-wrap: wrap;
    justify-content: center;
}

.mia-stat-card {
    background: var(--mia-surface);
    border: 1px solid var(--mia-border);
    border-radius: var(--rad-lg);
    padding: 20px 28px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    min-width: 130px;
}

.mia-stat-card--accent {
    border-color: rgba(78, 205, 196, 0.2);
    background: rgba(78, 205, 196, 0.06);
}

.mia-stat-value {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--mia-text);
}

.mia-stat-label {
    font-size: 0.75rem;
    color: var(--mia-text-muted);
    font-weight: 500;
}

/* --- Features Section --- */
.mia-features {
    padding: 100px 0;
    border-top: 1px solid var(--mia-border);
}

.mia-section-title {
    text-align: center;
    margin-bottom: 12px;
}

.mia-section-subtitle {
    text-align: center;
    max-width: 560px;
    margin: 0 auto 64px;
}

.mia-features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

/* Wide cards span 2 columns */
.mia-feature-card--wide {
    grid-column: span 2;
}

.mia-feature-card {
    background: var(--mia-surface);
    border: 1px solid var(--mia-border);
    border-radius: var(--rad-xl);
    padding: 32px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    transition: border-color 0.3s, transform 0.3s;
}

.mia-feature-card:hover {
    border-color: rgba(78, 205, 196, 0.15);
    transform: translateY(-4px);
}

.mia-feature-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--rad-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
}

.mia-icon-teal   { background: rgba(78, 205, 196, 0.1); }
.mia-icon-coral  { background: rgba(255, 107, 107, 0.1); }
.mia-icon-purple { background: rgba(168, 85, 247, 0.1); }
.mia-icon-amber  { background: rgba(245, 158, 11, 0.1); }

.mia-feature-card h3 { color: var(--mia-text); margin-bottom: 4px; }
.mia-feature-card p  { font-size: 0.95rem; margin: 0; }

/* Chat bubble preview */
.mia-feature-highlight {
    margin-top: 8px;
}

.mia-chat-bubble--mia {
    background: rgba(78, 205, 196, 0.08);
    border: 1px solid rgba(78, 205, 196, 0.15);
    border-radius: var(--rad-md);
    border-bottom-left-radius: 4px;
    padding: 16px 20px;
    font-size: 0.9rem;
    color: rgba(255,255,255,0.75);
    font-style: italic;
    line-height: 1.6;
}

/* Progress preview */
.mia-progress-preview {
    background: var(--mia-surface-hi);
    border-radius: var(--rad-md);
    padding: 16px;
    margin-top: 8px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.mia-progress-row {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    color: var(--mia-text-muted);
}

.mia-progress-row--current {
    color: var(--mia-text);
    font-weight: 600;
}

.muted    { color: var(--mia-text-dim); }
.accent-teal { color: var(--mia-teal); }

/* Session preview */
.mia-session-preview {
    background: var(--mia-surface-hi);
    border-radius: var(--rad-md);
    padding: 16px;
    margin-top: 8px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.mia-session-row {
    display: flex;
    align-items: center;
    gap: 16px;
}

.mia-session-exercise {
    font-weight: 600;
    font-size: 0.9rem;
    flex: 1;
    color: var(--mia-text);
}

.mia-session-sets {
    display: flex;
    gap: 6px;
}

.mia-set {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
}

.mia-set--done   { background: rgba(78, 205, 196, 0.15); color: var(--mia-teal); }
.mia-set--active { background: var(--mia-teal); color: var(--mia-bg); }
.mia-set--todo   { background: var(--mia-border); color: var(--mia-text-dim); border: 1px solid var(--mia-border); }

.mia-session-weight {
    font-size: 0.875rem;
    color: var(--mia-text-muted);
    font-weight: 600;
    min-width: 40px;
    text-align: right;
}

.mia-pause-timer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.85rem;
    color: var(--mia-text-muted);
    padding: 10px 14px;
    background: rgba(78, 205, 196, 0.05);
    border: 1px solid rgba(78, 205, 196, 0.1);
    border-radius: var(--rad-sm);
}

/* --- Science Section --- */
.mia-science {
    padding: 100px 0;
    border-top: 1px solid var(--mia-border);
    position: relative;
}

.mia-science-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.mia-science-text h2 { margin-bottom: 20px; }
.mia-science-text p  { margin-bottom: 24px; }

.mia-science-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.mia-science-list li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    font-size: 0.95rem;
    color: rgba(255,255,255,0.7);
}

.mia-check {
    color: var(--mia-teal);
    font-weight: 700;
    flex-shrink: 0;
    margin-top: 1px;
}

/* Goals grid */
.mia-goals-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
}

.mia-goal-card {
    background: var(--mia-surface);
    border: 1px solid var(--mia-border);
    border-radius: var(--rad-lg);
    padding: 20px 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    font-size: 0.8rem;
    color: var(--mia-text-muted);
    font-weight: 500;
    text-align: center;
    transition: border-color 0.25s, background 0.25s;
}

.mia-goal-card--active {
    border-color: rgba(78, 205, 196, 0.3);
    background: rgba(78, 205, 196, 0.06);
    color: var(--mia-teal);
}

.mia-goal-icon { font-size: 1.5rem; }

/* --- CTA Section --- */
.mia-cta {
    padding: 120px 32px;
    text-align: center;
    position: relative;
    overflow: hidden;
    border-top: 1px solid var(--mia-border);
}

.mia-cta-inner {
    position: relative;
    z-index: 1;
}

.mia-cta h2 { margin-bottom: 20px; }
.mia-cta p  { margin-bottom: 40px; }

.mia-cta-form {
    display: flex;
    gap: 10px;
    justify-content: center;
    max-width: 480px;
    margin: 0 auto 16px;
    flex-wrap: wrap;
}

.mia-input {
    flex: 1;
    min-width: 220px;
    padding: 14px 20px;
    background: var(--mia-surface);
    border: 1px solid var(--mia-border);
    border-radius: var(--rad-full);
    color: var(--mia-text);
    font-size: 1rem;
    outline: none;
    transition: border-color 0.25s;
}

.mia-input::placeholder { color: var(--mia-text-dim); }
.mia-input:focus { border-color: rgba(78, 205, 196, 0.4); }

.mia-cta-note {
    font-size: 0.8rem;
    color: var(--mia-text-dim);
    margin: 0;
}

/* --- Footer --- */
.mia-footer {
    padding: 32px;
    border-top: 1px solid var(--mia-border);
    text-align: center;
}

.mia-footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto 20px;
    flex-wrap: wrap;
    gap: 16px;
}

.mia-footer-logo {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    color: var(--mia-text-muted);
}

.mia-footer-links {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
    justify-content: center;
}

.mia-footer-links a {
    font-size: 0.875rem;
    color: var(--mia-text-dim);
    transition: color 0.25s;
}

.mia-footer-links a:hover { color: var(--mia-teal); }

.mia-footer-copy {
    font-size: 0.8rem;
    color: var(--mia-text-dim);
    margin: 0;
}

/* --- Focus & Selection --- */
a:focus-visible, button:focus-visible, input:focus-visible {
    outline: 2px solid var(--mia-teal);
    outline-offset: 2px;
}

::selection {
    background: rgba(78, 205, 196, 0.2);
    color: var(--mia-text);
}

/* --- Responsive --- */
@media (max-width: 900px) {
    .mia-features-grid {
        grid-template-columns: 1fr 1fr;
    }
    .mia-feature-card--wide {
        grid-column: span 2;
    }
    .mia-science-grid {
        grid-template-columns: 1fr;
        gap: 48px;
    }
}

@media (max-width: 768px) {
    .mia-nav { padding: 14px 20px; }

    .mia-nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0; right: 0;
        flex-direction: column;
        background: rgba(10, 10, 15, 0.98);
        backdrop-filter: blur(16px);
        padding: 20px;
        gap: 16px;
        border-bottom: 1px solid var(--mia-border);
    }

    .mia-nav-links.active { display: flex; }
    .mia-nav-btn-desktop  { display: none; }
    .mia-hamburger        { display: flex; }

    .mia-hero { padding-top: 120px; }

    .mia-features-grid {
        grid-template-columns: 1fr;
    }
    .mia-feature-card--wide { grid-column: span 1; }

    .mia-container { padding: 0 20px; }
    .mia-features, .mia-science { padding: 64px 0; }
    .mia-cta { padding: 80px 20px; }
}

@media (max-width: 480px) {
    .mia-goals-grid { grid-template-columns: repeat(2, 1fr); }
    .mia-hero-stats { gap: 10px; }
    .mia-stat-card  { min-width: 100px; padding: 16px 18px; }
    .mia-cta-form   { flex-direction: column; }
    .mia-input      { min-width: 100%; }
}