/* base.css – mobile-first base layout */

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

:root {
    --color-bg: #f5f5f5;
    --color-text: #1a1a1a;
    --color-primary: #2563eb;
    --color-primary-hover: #1d4ed8;
    --color-secondary: #6b7280;
    --color-secondary-hover: #4b5563;
    --color-surface: #ffffff;
    --color-border: #e5e7eb;
    --color-accent: #2563eb;
    --font-base: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-slogan: Georgia, 'Times New Roman', serif;
    --radius: 0.5rem;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    --transition: 0.25s ease;
}

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

body {
    background-color: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-base);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ── Layout ── */
.container {
    width: 100%;
    max-width: 800px;
    margin-inline: auto;
    padding-inline: 1rem;
}

/* ── Header ── */
.site-header {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: 0.75rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow);
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.site-logo {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--color-accent);
    text-decoration: none;
    letter-spacing: -0.02em;
}

.site-logo:hover {
    opacity: 0.85;
}

/* ── Pack nav ── */
.pack-nav {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.other-projects-link {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-accent);
    text-decoration: none;
    white-space: nowrap;
}

.other-projects-link:hover {
    opacity: 0.8;
}

.pack-nav select {
    appearance: none;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    color: var(--color-text);
    cursor: pointer;
    font-size: 0.9rem;
    padding: 0.4rem 2rem 0.4rem 0.75rem;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%236b7280' stroke-width='2' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.6rem center;
    transition: border-color var(--transition);
}

.pack-nav select:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
    border-color: var(--color-accent);
}

/* ── Main ── */
.site-main {
    flex: 1;
    padding: 2rem 0 3rem;
}

/* ── Hero ── */
.hero {
    text-align: center;
    padding: 2rem 0 1.5rem;
}

.hero-title {
    font-size: clamp(2rem, 6vw, 3.5rem);
    font-weight: 800;
    color: var(--color-accent);
    letter-spacing: -0.03em;
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--color-secondary);
    margin-top: 0.5rem;
}

.pack-label {
    margin-top: 0.75rem;
    font-size: 0.9rem;
    color: var(--color-secondary);
}

/* ── Slogan box ── */
.slogan-box {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: calc(var(--radius) * 2);
    box-shadow: var(--shadow);
    margin: 1.5rem 0;
    min-height: 120px;
    padding: 2rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.slogan-text {
    font-family: var(--font-slogan);
    font-size: clamp(1.1rem, 3.5vw, 1.6rem);
    line-height: 1.5;
    text-align: center;
    color: var(--color-text);
    opacity: 1;
    transition: opacity var(--transition);
}

.slogan-text.fade-out {
    opacity: 0;
}

.slogan-text.fade-in {
    animation: fadeIn 0.35s ease forwards;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(6px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ── Buttons ── */
.action-buttons {
    display: flex;
    gap: 0.75rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    font-family: var(--font-base);
    font-size: 1rem;
    font-weight: 600;
    padding: 0.75rem 1.75rem;
    transition: background var(--transition), transform 0.1s ease, opacity var(--transition);
    text-align: center;
}

.btn:active {
    transform: scale(0.97);
}

.btn:disabled {
    opacity: 0.45;
    cursor: default;
    pointer-events: none;
}

.btn-primary {
    background: var(--color-primary);
    color: #fff;
}

.btn-primary:hover {
    background: var(--color-primary-hover);
}

.btn-secondary {
    background: var(--color-secondary);
    color: #fff;
}

.btn-secondary:hover {
    background: var(--color-secondary-hover);
}

/* ── Counter ── */
.counter-display {
    text-align: center;
    color: var(--color-secondary);
    font-size: 0.85rem;
    margin-top: 1rem;
    min-height: 1.2em;
}

/* ── Ad block ── */
.ad-block {
    margin: 2rem auto 0;
    max-width: 728px;
    text-align: center;
}

/* ── Footer ── */
.site-footer {
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    padding: 1rem 0;
    text-align: center;
    font-size: 0.85rem;
    color: var(--color-secondary);
}

.footer-disclaimer {
    margin-top: 0.4rem;
    font-size: 0.78rem;
    opacity: 0.75;
}

/* ── Mode picker ── */
.mode-picker {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
    margin: 1.5rem 0;
}

.mode-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.35rem;
    background: var(--color-surface);
    border: 2px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 1.25rem 0.75rem;
    text-decoration: none;
    color: var(--color-text);
    transition: border-color var(--transition), transform 0.15s ease, box-shadow var(--transition);
    cursor: pointer;
    text-align: center;
}

.mode-card:hover {
    border-color: var(--color-accent);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
    transform: translateY(-2px);
}

.mode-card--active {
    border-color: var(--color-accent);
    background: color-mix(in srgb, var(--color-accent) 8%, var(--color-surface));
}

.mode-card__icon {
    font-size: 2rem;
    line-height: 1;
}

.mode-card__name {
    font-weight: 700;
    font-size: 1rem;
    color: var(--color-accent);
}

.mode-card__desc {
    font-size: 0.78rem;
    color: var(--color-secondary);
    line-height: 1.4;
}

@media (min-width: 500px) {
    .mode-picker {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* ── User name input ── */
.user-input-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    margin: 0.75rem 0 1rem;
}

.user-input-label {
    font-size: 0.9rem;
    color: var(--color-secondary);
    font-weight: 600;
}

.user-input-field {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    color: var(--color-text);
    font-family: var(--font-base);
    font-size: 1rem;
    padding: 0.5rem 0.85rem;
    text-align: center;
    transition: border-color var(--transition);
    width: 100%;
    max-width: 320px;
}

.user-input-field:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
    border-color: var(--color-accent);
}

/* ── Responsive tweaks ── */
@media (min-width: 640px) {
    .container {
        padding-inline: 2rem;
    }

    .slogan-box {
        padding: 2.5rem 2rem;
    }
}