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

:root {
    --bg-base: #020202;
    --bg-surface: rgba(13, 13, 13, 0.9);
    --bg-panel: rgba(19, 19, 19, 0.96);
    --bg-panel-soft: rgba(24, 24, 24, 0.92);
    --border-strong: rgba(255, 255, 255, 0.1);
    --border-soft: rgba(255, 255, 255, 0.06);
    --text-primary: #f6f3ee;
    --text-secondary: #cbc5ba;
    --text-muted: #8f897f;
    --accent: #f6f3ee;
    --accent-hover: #ffffff;
    --accent-soft: rgba(246, 243, 238, 0.18);
    --shadow: 0 28px 90px rgba(0, 0, 0, 0.45);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background:
        radial-gradient(circle at top, rgba(255, 255, 255, 0.12), transparent 32%),
        radial-gradient(circle at 20% 20%, rgba(255, 255, 255, 0.05), transparent 22%),
        linear-gradient(180deg, #080808 0%, var(--bg-base) 42%, #000 100%);
    color: var(--text-primary);
    min-height: 100vh;
    display: block;
}

main {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px 0 48px;
}

/* ── Layout ─────────────────────────────────────────────────────── */

.hero {
    padding: 56px 28px 10px;
}

.hero-inner {
    max-width: 1100px;
    margin: 0 auto;
    text-align: center;
}

.hero h1 {
    margin-bottom: 18px;
}

.hero-text {
    max-width: 760px;
    margin: 0 auto;
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 1.05rem;
}

.container {
    width: 100%;
    max-width: 980px;
    padding: 20px 28px;
}

.card {
    max-width: 720px;
    margin: 0 auto;
    background: linear-gradient(180deg, rgba(22, 22, 22, 0.98), rgba(11, 11, 11, 0.98));
    border: 1px solid var(--border-strong);
    border-radius: 20px;
    padding: 40px;
    box-shadow: var(--shadow);
    backdrop-filter: blur(12px);
}

/* ── Typography ─────────────────────────────────────────────────── */

h1 {
    font-family: "Space Grotesk", "Segoe UI", sans-serif;
    font-size: clamp(3.5rem, 10vw, 5.8rem);
    font-weight: 700;
    line-height: 0.95;
    letter-spacing: -0.05em;
    color: var(--text-primary);
    margin-bottom: 8px;
}

h2 {
    font-size: 1.55rem;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: 32px;
    line-height: 1.6;
}

/* ── Form ───────────────────────────────────────────────────────── */

.form-group {
    margin-bottom: 16px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-size: 0.92rem;
    color: var(--text-secondary);
}

input[type="email"],
input[type="password"] {
    width: 100%;
    padding: 14px 16px;
    background: var(--bg-surface);
    border: 1px solid var(--border-soft);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 1rem;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
}

input:focus {
    border-color: var(--accent);
    background: rgba(17, 17, 17, 0.96);
    box-shadow: 0 0 0 4px var(--accent-soft);
}

/* ── Buttons ────────────────────────────────────────────────────── */

button[type="submit"],
.btn-primary {
    display: inline-block;
    width: 100%;
    padding: 14px;
    background: linear-gradient(180deg, var(--accent-hover), var(--accent));
    color: #050505;
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: transform 0.2s, filter 0.2s;
    margin-top: 8px;
    text-align: center;
    text-decoration: none;
}

button[type="submit"]:hover,
.btn-primary:hover {
    filter: brightness(1.06);
    transform: translateY(-1px);
}

button[type="submit"]:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-secondary {
    width: 100%;
    padding: 14px;
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-soft);
    border-radius: 12px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s;
    margin-top: 8px;
}

.btn-secondary:hover {
    border-color: var(--accent);
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.03);
}

.btn-block {
    display: block;
    margin-top: 16px;
}

.btn-copy-link {
    margin-top: 14px;
}

.btn-group {
    display: flex;
    gap: 12px;
    margin-top: 20px;
}

.btn-group .btn-primary,
.btn-group .btn-secondary {
    flex: 1;
    margin-top: 0;
}

/* ── Error / Loading ────────────────────────────────────────────── */

.error {
    color: #ff8e7b;
    margin-top: 16px;
    font-size: 0.9rem;
    text-align: center;
}

.hidden {
    display: none !important;
}

.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-top: 16px;
    color: var(--text-muted);
}

.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.12);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* ── Result actions ──────────────────────────────────────────────── */

.calendar-actions {
    margin-top: 28px;
}

.calendar-platform-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
}

.calendar-platform-btn {
    display: flex;
    align-items: center;
    gap: 14px;
    min-height: 74px;
    padding: 14px 16px;
    background: linear-gradient(180deg, rgba(24, 24, 24, 0.98), rgba(12, 12, 12, 0.98));
    color: var(--text-primary);
    border: 1px solid var(--border-strong);
    border-radius: 16px;
    text-decoration: none;
    transition: transform 0.2s, border-color 0.2s, background 0.2s;
}

.calendar-platform-btn:hover {
    transform: translateY(-1px);
    border-color: rgba(255, 255, 255, 0.24);
    background: linear-gradient(180deg, rgba(29, 29, 29, 0.98), rgba(14, 14, 14, 0.98));
}

.calendar-platform-btn:focus-visible {
    outline: none;
    box-shadow: 0 0 0 4px var(--accent-soft);
}

.platform-icon-shell {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    flex: 0 0 44px;
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.platform-icon-shell--google {
    background: #ffffff;
    border-color: rgba(255, 255, 255, 0.16);
}

.platform-icon-svg {
    width: 22px;
    height: 22px;
    fill: #f6f3ee;
}

.platform-icon-image {
    width: 24px;
    height: 24px;
    display: block;
}

.platform-copy {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
}

.platform-label {
    color: var(--text-muted);
    font-size: 0.82rem;
}

.platform-copy strong {
    font-size: 0.98rem;
    line-height: 1.3;
}

.copy-feedback {
    color: #6fd2a4;
    font-size: 0.85rem;
    margin-top: 10px;
    text-align: center;
}

/* ── SEO content ─────────────────────────────────────────────────── */

.seo-content {
    max-width: 720px;
    margin: 20px auto 0;
    background: linear-gradient(180deg, rgba(17, 17, 17, 0.92), rgba(9, 9, 9, 0.95));
    border: 1px solid var(--border-strong);
    border-radius: 20px;
    padding: 28px 30px;
    box-shadow: var(--shadow);
}

.seo-content h2 {
    margin-bottom: 14px;
}

.seo-content h3 {
    margin-top: 18px;
    margin-bottom: 8px;
    color: var(--text-primary);
    font-size: 1.05rem;
}

.seo-content p {
    color: var(--text-secondary);
    line-height: 1.7;
}

.site-footer {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.82rem;
    padding: 8px 16px 28px;
}

@media (max-width: 600px) {
    .card {
        padding: 26px 22px;
    }

    .container {
        padding: 14px;
    }

    .hero {
        padding: 34px 16px 6px;
    }

    .hero-text {
        font-size: 0.98rem;
    }

    .calendar-platform-btn {
        min-height: 68px;
        padding: 12px;
        gap: 10px;
    }

    .platform-icon-shell {
        width: 40px;
        height: 40px;
        flex-basis: 40px;
    }

    .platform-copy strong {
        font-size: 0.9rem;
    }

    .btn-group {
        flex-direction: column;
    }

    .seo-content {
        padding: 24px 22px;
    }
}