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

:root {
    --bg:          #09090e; 
    --surface:     #12121a;
    --surface-hover: #171722;
    --border:      #22222f;
    --border-glow: #3b82f6;
    --text-main:   #f8fafc;
    --text-muted:  #94a3b8;
    --accent:      #06b6d4; 
    --accent-hover:#22d3ee;
    --accent-glow: rgba(6, 182, 212, 0.4);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg);
    background-image: 
        linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: 40px 40px;
    color: var(--text-main);
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

.hero {
    padding: 6rem 1.5rem 4rem;
    text-align: center;
    position: relative;
}

.logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 0.95rem;
    font-weight: 700;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--accent);
    background: rgba(6, 182, 212, 0.05);
    padding: 8px 24px;
    border-radius: 4px;
    border: 1px solid rgba(6, 182, 212, 0.2);
    margin-bottom: 2.5rem;
    box-shadow: 0 0 15px rgba(6, 182, 212, 0.1);
}

.logo-dot {
    width: 8px;
    height: 8px;
    background: var(--accent);
    box-shadow: 0 0 10px var(--accent);
}

.hero-title {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: clamp(2.5rem, 7vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    margin: 0 0 1.5rem;
}

.gradient-text {
    background: linear-gradient(90deg, #38bdf8, #818cf8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.search-wrap {
    background: #0f0f16;
    border: 1px solid var(--border);
    border-radius: 12px;
    display: flex;
    align-items: center;
    padding: 6px;
    max-width: 760px;
    margin: 0 auto;
    transition: all 0.3s ease;
    box-shadow: 0 10px 40px rgba(0,0,0,0.5);
}

.search-wrap:focus-within {
    border-color: var(--accent);
    box-shadow: 0 0 20px rgba(6, 182, 212, 0.15), 0 10px 40px rgba(0,0,0,0.5);
}

.search-input {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    color: white;
    font-family: 'Inter', sans-serif;
    font-size: 1.1rem;
    padding: 16px 24px;
}

.search-input::placeholder { color: #52525b; font-family: monospace; }

.search-btn {
    background: var(--text-main);
    color: var(--bg);
    border: none;
    padding: 14px 28px;
    border-radius: 8px;
    font-weight: 700;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.2s;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.search-btn:hover {
    background: var(--accent);
    color: #000;
    box-shadow: 0 0 15px var(--accent-glow);
}

.content {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem 1.5rem 6rem;
}

.loader-wrap {
    text-align: center;
    padding: 6rem 0;
}

.loader-spinner {
    width: 60px;
    height: 60px;
    border: 3px solid rgba(255,255,255,0.05);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 1s cubic-bezier(0.55, 0.055, 0.675, 0.19) infinite;
    margin: 0 auto 2rem;
}

.loader-status {
    font-family: monospace;
    font-size: 1.1rem;
    color: var(--accent);
    letter-spacing: 0.05em;
}

.result-header {
    text-align: center;
    margin-bottom: 4rem;
}

.result-header h2 {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.timeline {
    display: flex;
    flex-direction: column;
    gap: 3rem;
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 27px;
    top: 40px;
    bottom: 20px;
    width: 2px;
    background: linear-gradient(to bottom, var(--accent), #27272f 50%, #27272f);
    box-shadow: 0 0 10px var(--accent-glow);
}

.step-card {
    display: grid;
    grid-template-columns: 56px 1fr;
    gap: 2rem;
    animation: rise 0.5s ease forwards;
}

.step-circle {
    width: 56px;
    height: 56px;
    background: var(--bg);
    border: 2px solid var(--accent);
    color: var(--accent);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 1.4rem;
    font-weight: 700;
    z-index: 2;
    box-shadow: 0 0 15px rgba(6, 182, 212, 0.2);
    transition: all 0.3s;
}

.step-card:hover .step-circle {
    background: var(--accent);
    color: #000;
    box-shadow: 0 0 20px var(--accent-glow);
}

.step-body {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 2rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

.step-card:hover .step-body {
    border-color: rgba(56, 189, 248, 0.3);
    background: var(--surface-hover);
}

.step-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.step-title {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 1.4rem;
    font-weight: 700;
    color: #fff;
}

.step-duration {
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--border);
    padding: 4px 12px;
    border-radius: 6px;
    font-size: 0.85rem;
    font-family: monospace;
    color: var(--accent);
}

.step-desc {
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: 2rem;
}

.subtopics-title {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: #fff;
    margin-bottom: 1rem;
    font-weight: 600;
}

.subtopic-tile {
    display: flex;
    gap: 16px;
    margin-bottom: 12px;
    padding: 1.2rem;
    background: #0d0d14;
    border-radius: 12px;
    border: 1px solid var(--border);
    transition: all 0.2s;
}

.subtopic-tile:hover {
    border-color: rgba(6, 182, 212, 0.3);
}

.bullet-accent {
    width: 4px;
    height: 100%;
    min-height: 24px;
    background: var(--accent);
    border-radius: 2px;
    box-shadow: 0 0 8px var(--accent-glow);
    flex-shrink: 0;
}

.subtopic-name {
    font-weight: 600;
    color: #fff;
    margin-bottom: 4px;
}

.subtopic-detail {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.5;
}

.resources-wrapper {
    margin-top: 2rem;
    padding: 1.5rem;
    background: rgba(6, 182, 212, 0.03);
    border: 1px dashed rgba(6, 182, 212, 0.2);
    border-radius: 12px;
}

.resources-title {
    color: var(--accent);
    font-weight: 600;
    margin-bottom: 1rem;
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.resource-chip {
    background: #0f0f16;
    border: 1px solid var(--border);
    padding: 8px 16px;
    border-radius: 6px;
    display: inline-block;
    margin: 4px 8px 4px 0;
    font-size: 0.9rem;
    color: #cbd5e1;
    transition: all 0.2s;
}

.resource-chip:hover {
    border-color: var(--accent);
    color: #fff;
}

.btn-download {
    background: transparent;
    color: var(--text-main);
    border: 1px solid var(--text-muted);
    padding: 14px 28px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    margin-top: 1rem;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    transition: all 0.3s;
}

.btn-download:hover {
    background: #fff;
    color: #000;
    border-color: #fff;
}

/* ── Выбор Уровня ── */
.level-selector {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-top: 20px;
    flex-wrap: wrap;
}

.level-chip {
    background: #0f0f16;
    border: 1px solid var(--border);
    padding: 8px 20px;
    border-radius: 8px;
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
    user-select: none;
}

.level-chip:hover {
    border-color: rgba(6, 182, 212, 0.4);
    color: var(--text-main);
}

.level-chip.active {
    border-color: var(--accent);
    color: #fff;
    box-shadow: 0 0 15px var(--accent-glow);
    background: rgba(6, 182, 212, 0.05);
}

/* ── Режим Диалога ── */
.dialog-box {
    background: var(--surface);
    border: 1px dashed var(--accent);
    border-radius: 16px;
    padding: 3rem 2rem;
    text-align: center;
    box-shadow: 0 10px 40px rgba(0,0,0,0.3);
}

.dialog-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    animation: rise 0.5s ease;
}

@keyframes spin { to { transform: rotate(360deg); } }
@keyframes rise {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 768px) {
    .search-wrap { flex-direction: column; background: transparent; border: none; box-shadow: none; gap: 10px; }
    .search-input { width: 100%; background: #0f0f16; border: 1px solid var(--border); border-radius: 12px; text-align: center; }
    .search-btn { width: 100%; }
    
    .timeline::before { left: 24px; }
    .step-card { grid-template-columns: 48px 1fr; gap: 1rem; }
    .step-circle { width: 48px; height: 48px; font-size: 1.2rem; }
    .step-body { padding: 1.5rem 1rem; }
    
    .clarify-wrap { flex-direction: column; }
}