/* ========================================
   Zovira-DeepFlow v2.1 — Layout
   ======================================== */

#particlesCanvas {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
}

.container {
    max-width: 880px;
    margin: 0 auto;
    padding: 24px 16px;
    position: relative;
    z-index: 1;
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 20px;
    animation: fadeSlideIn 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.header-logo {
    display: inline-block;
    cursor: pointer;
    user-select: none;
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    -webkit-tap-highlight-color: transparent;
}
.header-logo:hover {
    transform: translateY(-2px);
}
.header-logo:active {
    transform: scale(0.94);
}

.logo-text-wrapper {
    position: relative;
    display: inline-block;
}

.header h1 {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 6em;
    font-weight: 700;
    letter-spacing: -0.04em;
    background: linear-gradient(180deg, var(--accent-light, #c4b5fd) 0%, var(--accent) 50%, var(--accent-hover, #5a52e0) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 0;
    line-height: 1;
    animation: logoGlow 3s ease-in-out infinite;
}

@keyframes logoGlow {
    0%, 100% {
        filter: drop-shadow(0 0 20px var(--glow));
    }
    50% {
        filter: drop-shadow(0 0 45px var(--glow)) drop-shadow(0 0 80px rgba(160, 140, 220, 0.3));
    }
}

.header .model-badge {
    display: inline-block;
    font-family: 'IBM Plex Mono', monospace;
    background: var(--accent);
    border: none;
    border-radius: 5px;
    padding: 5px 14px;
    font-size: 0.55em;
    color: #ffffff;
    letter-spacing: 0.05em;
    font-weight: 700;
    position: absolute;
    top: 2%;
    right: -10px;
    text-transform: uppercase;
    white-space: nowrap;
    z-index: 2;
    transition: background 0.4s ease;
}

.header .subtitle {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.78em;
    color: var(--subtext);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    font-weight: 400;
    margin-top: 10px;
    transition: color 0.4s ease;
}

/* Promo */
.promo {
    text-align: center;
    margin-bottom: 30px;
    animation: fadeSlideIn 0.6s cubic-bezier(0.16, 1, 0.3, 1) 0.1s backwards;
}

.promo .split {
    display: inline-flex;
    border-radius: 12px;
    overflow: hidden;
    font-size: 0.8em;
    font-weight: 700;
    box-shadow: 0 4px 16px rgba(0,0,0,0.3);
}
.promo .split .left {
    background: var(--accent);
    color: #ffffff;
    padding: 10px 18px;
    font-family: 'IBM Plex Mono', monospace;
    letter-spacing: 0.04em;
}
.promo .split .right {
    background: var(--card-bg);
    color: var(--subtext);
    padding: 10px 18px;
    border: 1px solid var(--border);
    border-left: none;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    transition: background 0.4s ease, color 0.4s ease, border-color 0.4s ease;
}

.promo-description {
    max-width: 700px;
    margin: 16px auto 0;
    font-size: 0.78em;
    color: var(--subtext);
    line-height: 1.7;
    text-align: center;
    opacity: 0.7;
    transition: color 0.4s ease;
}

/* Cards */
.cards {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 28px;
    animation: fadeSlideIn 0.6s cubic-bezier(0.16, 1, 0.3, 1) 0.2s backwards;
}
.card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 28px 24px;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: var(--card-shadow);
    transition: border-color 0.3s ease, box-shadow 0.3s ease, background 0.4s ease;
}
.card:focus-within {
    border-color: var(--accent);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4), 0 0 0 1px rgba(108, 99, 255, 0.2);
}

.card-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 22px;
    justify-content: center;
}
.card-header .card-icon {
    width: 28px;
    height: 28px;
    transition: color 0.4s ease;
}
.card h3 {
    font-size: 1.15em;
    font-weight: 600;
    letter-spacing: 0.05em;
    color: var(--text);
    transition: color 0.4s ease;
}

.card.partner .card-header .card-icon { color: var(--badge-text); }
.card.self .card-header .card-icon { color: var(--accent); }

/* Footer */
.footer {
    text-align: center;
    font-size: 0.65em;
    color: var(--subtext);
    opacity: 0.4;
    margin-top: 40px;
    letter-spacing: 0.04em;
    transition: color 0.4s ease;
}
.status-line {
    text-align: center;
    font-size: 0.65em;
    color: var(--subtext);
    opacity: 0.5;
    margin-top: 16px;
    transition: color 0.4s ease;
}

/* About link */
.about-link-wrapper {
    text-align: center;
    margin-top: 12px;
}
.about-link {
    font-size: 0.7em;
    color: var(--subtext);
    opacity: 0.4;
    cursor: pointer;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    transition: opacity 0.3s ease, color 0.3s ease;
    border-bottom: 1px dashed transparent;
    padding-bottom: 2px;
    user-select: none;
}
.about-link:hover {
    opacity: 0.8;
    color: var(--accent-light);
    border-bottom-color: var(--accent-light);
}

@keyframes fadeSlideIn {
    from { opacity: 0; transform: translateY(16px); }
    to { opacity: 1; transform: translateY(0); }
}