/* ============================================
   Buddy OS — Design System & Global Styles
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ---- CSS Variables ---- */
:root {
    --bg-main: #fbfbfd;
    --bg-secondary: #ffffff;
    --black: #1d1d1f;
    --dark-gray: #86868b;
    --light-gray: #f5f5f7;
    --accent: #FF7043;
    --accent-hover: #E64A19;
    --text-dim: #86868b;
    --border: #d2d2d7;
    --radius: 12px;
    --radius-lg: 20px;
    --shadow: 0 2px 12px rgba(0,0,0,0.07);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.10);
    --transition: 0.2s ease;
}

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

html { scroll-behavior: smooth; }

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-main);
    color: var(--black);
    line-height: 1.6;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
button { cursor: pointer; font-family: inherit; }
ul { list-style: none; }

/* ---- Typography ---- */
h1, h2, h3, h4 { font-weight: 700; line-height: 1.2; }
h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.6rem, 3vw, 2.4rem); }
h3 { font-size: 1.2rem; }
p { color: var(--dark-gray); }

.text-accent { color: var(--accent); }
.text-center { text-align: center; }
.text-dim { color: var(--text-dim); }

/* ---- Layout ---- */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

.section { padding: 80px 0; }
.section-sm { padding: 48px 0; }

.section-light { background: var(--light-gray); }

/* ---- Buttons ---- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    transition: var(--transition);
    white-space: nowrap;
}

.btn-primary {
    background: var(--accent);
    color: #fff;
}
.btn-primary:hover { background: var(--accent-hover); transform: translateY(-1px); box-shadow: 0 4px 16px rgba(255,112,67,0.35); }

.btn-secondary {
    background: transparent;
    color: var(--black);
    border: 2px solid var(--border);
}
.btn-secondary:hover { border-color: var(--black); }

.btn-lg { padding: 16px 36px; font-size: 1.1rem; }
.btn-sm { padding: 8px 18px; font-size: 0.875rem; }

.btn-group { display: flex; gap: 12px; flex-wrap: wrap; }

/* ---- Navbar ---- */
.navbar {
    background: rgba(251,251,253,0.9);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.nav-logo {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--black);
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-logo span { color: var(--accent); }

.nav-links { display: flex; gap: 32px; align-items: center; }
.nav-links a { font-size: 0.9rem; font-weight: 500; color: var(--dark-gray); transition: var(--transition); }
.nav-links a:hover, .nav-links a.active { color: var(--black); }

/* ---- Hero ---- */
.hero {
    padding: 80px 0 60px;
    overflow: hidden;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(255,112,67,0.1);
    color: var(--accent);
    padding: 6px 14px;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.hero h1 { margin-bottom: 20px; }
.hero-sub { font-size: 1.15rem; margin-bottom: 32px; max-width: 480px; }

.hero-visual {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 420px;
}

/* Abstract canvas visualization */
.canvas-wrap {
    position: relative;
    width: 100%;
    height: 100%;
}

.canvas-wrap canvas {
    width: 100%;
    height: 100%;
}

/* Floating cards around canvas */
.floating-card {
    position: absolute;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 14px 18px;
    box-shadow: var(--shadow-lg);
    font-size: 0.85rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 10px;
    animation: float 6s ease-in-out infinite;
}

.floating-card .icon {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    flex-shrink: 0;
}

.fc-1 { top: 10%; left: 5%; animation-delay: 0s; }
.fc-2 { top: 5%; right: 10%; animation-delay: 1.5s; }
.fc-3 { bottom: 20%; left: 0; animation-delay: 3s; }
.fc-4 { bottom: 10%; right: 5%; animation-delay: 4.5s; }
.fc-5 { top: 45%; left: -5%; animation-delay: 2s; }

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-12px); }
}

/* ---- Features ---- */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 48px;
}

.feature-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    transition: var(--transition);
}

.feature-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.feature-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    background: rgba(255,112,67,0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    margin-bottom: 20px;
}

.feature-card h3 { margin-bottom: 10px; color: var(--black); }

/* ---- How It Works ---- */
.steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    margin-top: 48px;
    position: relative;
}

.steps::before {
    content: '';
    position: absolute;
    top: 36px;
    left: calc(16.66% + 20px);
    right: calc(16.66% + 20px);
    height: 2px;
    background: linear-gradient(90deg, var(--accent), var(--border));
    z-index: 0;
}

.step {
    text-align: center;
    position: relative;
    z-index: 1;
}

.step-num {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background: var(--accent);
    color: #fff;
    font-size: 1.5rem;
    font-weight: 800;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    box-shadow: 0 4px 16px rgba(255,112,67,0.3);
}

.step h3 { margin-bottom: 8px; }
.step p { font-size: 0.9rem; }

/* ---- Pricing ---- */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 48px;
    align-items: start;
}

.pricing-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    position: relative;
    transition: var(--transition);
}

.pricing-card.featured {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px rgba(255,112,67,0.15), var(--shadow-lg);
    transform: scale(1.03);
}

.pricing-card:hover { box-shadow: var(--shadow-lg); }

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 4px 16px;
    border-radius: 50px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.pricing-name {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.pricing-price {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--black);
    margin-bottom: 4px;
}

.pricing-price span {
    font-size: 1rem;
    font-weight: 400;
    color: var(--dark-gray);
}

.pricing-desc {
    font-size: 0.875rem;
    color: var(--dark-gray);
    margin-bottom: 24px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border);
}

.pricing-features {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 28px;
}

.pricing-feature {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
    color: var(--dark-gray);
}

.pricing-feature .check {
    color: var(--accent);
    font-weight: 700;
    flex-shrink: 0;
}

/* ---- Testimonials ---- */
.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 48px;
}

.testimonial-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 28px;
}

.testimonial-card .stars {
    color: #FFB800;
    font-size: 0.9rem;
    margin-bottom: 14px;
    letter-spacing: 2px;
}

.testimonial-card blockquote {
    font-size: 0.95rem;
    color: var(--black);
    margin-bottom: 16px;
    line-height: 1.5;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 12px;
}

.author-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), #FF8A65);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 700;
    font-size: 0.875rem;
}

.author-name { font-size: 0.875rem; font-weight: 600; color: var(--black); }
.author-role { font-size: 0.75rem; color: var(--dark-gray); }

/* ---- Footer ---- */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    padding: 60px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 48px;
}

.footer-brand p {
    font-size: 0.875rem;
    margin-top: 12px;
    max-width: 260px;
}

.footer-col h4 {
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--dark-gray);
    margin-bottom: 16px;
}

.footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-col ul li a { font-size: 0.875rem; color: var(--dark-gray); transition: var(--transition); }
.footer-col ul li a:hover { color: var(--black); }

.footer-bottom {
    border-top: 1px solid var(--border);
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    color: var(--dark-gray);
}

/* ---- Onboarding ---- */
.onboard-container {
    max-width: 680px;
    margin: 0 auto;
    padding: 40px 24px;
}

.onboard-progress {
    display: flex;
    align-items: center;
    gap: 0;
    margin-bottom: 48px;
    position: relative;
}

.progress-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    flex: 1;
    position: relative;
    z-index: 1;
}

.progress-step::before {
    content: '';
    position: absolute;
    top: 18px;
    left: 50%;
    right: -50%;
    height: 2px;
    background: var(--border);
    z-index: 0;
}

.progress-step:last-child::before { display: none; }

.progress-step.done::before { background: var(--accent); }

.step-circle {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 2px solid var(--border);
    background: var(--bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--dark-gray);
    position: relative;
    z-index: 2;
    transition: var(--transition);
}

.progress-step.done .step-circle,
.progress-step.active .step-circle {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

.step-label {
    font-size: 0.7rem;
    color: var(--dark-gray);
    margin-top: 8px;
    font-weight: 500;
    text-align: center;
}

.progress-step.active .step-label { color: var(--accent); font-weight: 600; }

.onboard-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 40px;
    box-shadow: var(--shadow-lg);
}

.onboard-card h2 { margin-bottom: 8px; }
.onboard-card .subtitle { margin-bottom: 32px; }

.plan-select-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 24px;
}

.plan-option {
    border: 2px solid var(--border);
    border-radius: var(--radius);
    padding: 20px 16px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    background: var(--bg-secondary);
}

.plan-option:hover { border-color: var(--accent); }
.plan-option.selected { border-color: var(--accent); background: rgba(255,112,67,0.04); }

.plan-option .plan-name { font-weight: 700; font-size: 0.95rem; margin-bottom: 4px; }
.plan-option .plan-price { font-size: 1.3rem; font-weight: 800; color: var(--accent); }
.plan-option .plan-price span { font-size: 0.75rem; font-weight: 400; color: var(--dark-gray); }

.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-size: 0.875rem; font-weight: 600; margin-bottom: 8px; }

.form-input {
    width: 100%;
    padding: 12px 16px;
    border: 1.5px solid var(--border);
    border-radius: var(--radius);
    font-size: 0.95rem;
    font-family: inherit;
    background: var(--bg-main);
    color: var(--black);
    transition: var(--transition);
}

.form-input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(255,112,67,0.1);
}

.form-hint {
    font-size: 0.78rem;
    color: var(--dark-gray);
    margin-top: 6px;
}

.code-block {
    background: #1d1d1f;
    color: #e8e8ed;
    border-radius: var(--radius);
    padding: 16px 20px;
    font-family: 'SF Mono', 'Fira Code', monospace;
    font-size: 0.85rem;
    margin: 16px 0;
    overflow-x: auto;
    position: relative;
}

.code-block .copy-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    background: rgba(255,255,255,0.1);
    border: none;
    color: #e8e8ed;
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 0.75rem;
    cursor: pointer;
    transition: var(--transition);
}

.code-block .copy-btn:hover { background: rgba(255,255,255,0.2); }

.telegram-setup {
    background: rgba(0,136,204,0.06);
    border: 1px solid rgba(0,136,204,0.2);
    border-radius: var(--radius);
    padding: 20px;
    margin-top: 16px;
}

.telegram-setup h4 {
    color: #0088cc;
    font-size: 0.9rem;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.telegram-setup ol {
    padding-left: 20px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.telegram-setup ol li {
    font-size: 0.875rem;
    color: var(--dark-gray);
}

.telegram-setup ol li a { color: #0088cc; text-decoration: underline; }

.success-screen {
    text-align: center;
    padding: 20px 0;
}

.success-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: rgba(76,175,80,0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    margin: 0 auto 24px;
}

.onboard-nav {
    display: flex;
    justify-content: space-between;
    margin-top: 28px;
}

/* ---- Dashboard ---- */
.dashboard-grid {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 28px;
    align-items: start;
}

.sidebar {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.sidebar-header {
    padding: 24px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 12px;
}

.sidebar-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), #FF8A65);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.2rem;
}

.sidebar-name { font-weight: 700; font-size: 0.95rem; }
.sidebar-plan { font-size: 0.75rem; color: var(--accent); font-weight: 600; }

.sidebar-nav { padding: 12px; }
.sidebar-nav ul { display: flex; flex-direction: column; gap: 2px; }
.sidebar-nav ul li a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: var(--radius);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--dark-gray);
    transition: var(--transition);
}
.sidebar-nav ul li a:hover { background: var(--light-gray); color: var(--black); }
.sidebar-nav ul li a.active { background: rgba(255,112,67,0.08); color: var(--accent); font-weight: 600; }
.sidebar-nav ul li a .icon { font-size: 1.1rem; }

.dashboard-main {}

.dashboard-topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
}

.status-badge.online { background: rgba(76,175,80,0.1); color: #4CAF50; }
.status-badge.offline { background: rgba(244,67,54,0.1); color: #F44336; }

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: currentColor;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.stats-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
}

.stat-label { font-size: 0.78rem; color: var(--dark-gray); font-weight: 500; margin-bottom: 4px; }
.stat-value { font-size: 1.6rem; font-weight: 800; color: var(--black); }
.stat-sub { font-size: 0.75rem; color: var(--dark-gray); margin-top: 2px; }
.stat-value.accent { color: var(--accent); }

.quick-actions {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 24px;
}

.action-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
}

.action-card:hover {
    border-color: var(--accent);
    box-shadow: var(--shadow);
    transform: translateY(-2px);
}

.action-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    background: rgba(255,112,67,0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
}

.action-card h4 { font-size: 0.9rem; }
.action-card p { font-size: 0.78rem; }

.recent-activity {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px;
}

.activity-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
}

.activity-item:last-child { border-bottom: none; }

.activity-icon {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: var(--light-gray);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    flex-shrink: 0;
}

.activity-text { flex: 1; }
.activity-text .title { font-size: 0.875rem; font-weight: 500; color: var(--black); }
.activity-text .time { font-size: 0.75rem; color: var(--dark-gray); }

/* ---- Responsive ---- */
@media (max-width: 900px) {
    .hero .container { grid-template-columns: 1fr; }
    .hero-visual { display: none; }
    .features-grid, .steps, .pricing-grid, .testimonials-grid { grid-template-columns: 1fr 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .dashboard-grid { grid-template-columns: 1fr; }
    .quick-actions { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
    .features-grid, .steps, .pricing-grid, .testimonials-grid,
    .stats-row, .quick-actions { grid-template-columns: 1fr; }
    .plan-select-grid { grid-template-columns: 1fr; }
    .nav-links { display: none; }
    .footer-grid { grid-template-columns: 1fr; }
    .onboard-card { padding: 24px; }
    .hero { padding: 48px 0 36px; }
    .section { padding: 56px 0; }
    .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
}

/* ---- Trait Cards (Buddy Customization) ---- */
.trait-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 12px;
}

.trait-card {
    background: var(--bg-main);
    border: 2px solid var(--border-color);
    border-radius: var(--radius);
    padding: 16px 12px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s ease;
    user-select: none;
}

.trait-card:hover {
    border-color: var(--accent);
    background: rgba(255, 112, 67, 0.04);
    transform: translateY(-2px);
}

.trait-card.selected {
    border-color: var(--accent);
    background: rgba(255, 112, 67, 0.08);
    box-shadow: 0 0 0 3px rgba(255, 112, 67, 0.15);
}

.trait-icon {
    font-size: 28px;
    margin-bottom: 8px;
}

.trait-name {
    font-weight: 700;
    font-size: 0.9rem;
    margin-bottom: 4px;
    color: var(--black);
}

.trait-desc {
    font-size: 0.75rem;
    color: var(--dark-gray);
    line-height: 1.4;
}