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

:root {
    --clr-bg: #f7f5f0;
    --clr-surface: #ffffff;
    --clr-border: #e2ddd6;
    --clr-accent: #3c3489;
    --clr-accent-h: #534ab7;
    --clr-text: #1a1a1a;
    --clr-muted: #7a7670;
    --clr-link: #185fa5;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 18px;
    --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.06);
    --font: 'Georgia', serif;
    --font-ui: system-ui, -apple-system, sans-serif;
}

body {
    min-height: 100vh;
    background: var(--clr-bg);
    font-family: var(--font-ui);
    color: var(--clr-text);
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 3rem 1.25rem 2rem;
    gap: 2.5rem;
}


.site-header {
    text-align: center;
}

.site-title {
    font-family: var(--font);
    font-size: clamp(1.8rem, 5vw, 2.6rem);
    font-weight: normal;
    letter-spacing: 0.02em;
    color: var(--clr-text);
}

.site-subtitle {
    margin-top: 0.4rem;
    font-size: 0.95rem;
    color: var(--clr-muted);
    letter-spacing: 0.03em;
}


.main-content {
    width: 100%;
    max-width: 520px;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-section {
    background: var(--clr-surface);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    padding: 1.75rem 1.5rem;
}

.haiku-form {
    display: flex;
    gap: 0.75rem;
}

.keyword-input {
    flex: 1;
    height: 44px;
    padding: 0 1rem;
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-family: var(--font-ui);
    color: var(--clr-text);
    background: var(--clr-bg);
    outline: none;
    transition: border-color 0.15s, box-shadow 0.15s;
}

.keyword-input::placeholder {
    color: var(--clr-muted);
}

.keyword-input:focus {
    border-color: var(--clr-accent);
    box-shadow: 0 0 0 3px rgba(60, 52, 137, 0.12);
}

.submit-btn {
    height: 44px;
    padding: 0 1.4rem;
    background: var(--clr-accent);
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-family: var(--font-ui);
    font-weight: 500;
    letter-spacing: 0.02em;
    cursor: pointer;
    transition: background 0.15s, transform 0.1s;
    white-space: nowrap;
}

.submit-btn:hover {
    background: var(--clr-accent-h);
}

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


.haiku-section {
    min-height: 140px;
}

.haiku-card {
    background: var(--clr-surface);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    padding: 2rem 1.75rem;
    text-align: center;
}


.haiku-line {
    font-family: var(--font);
    font-size: 1.1rem;
    line-height: 2;
    color: var(--clr-text);
    display: block;
}

.haiku-line+.haiku-line {
    border-top: 1px solid var(--clr-border);
    padding-top: 0.5rem;
    margin-top: 0.5rem;
}


.haiku-card.is-loading .haiku-placeholder {
    animation: pulse 1.2s ease-in-out infinite;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.35;
    }
}

.site-footer {
    margin-top: auto;
    font-size: 0.8rem;
    color: var(--clr-muted);
    text-align: center;
}

.site-footer a {
    color: var(--clr-link);
    text-decoration: none;
}

.site-footer a:hover {
    text-decoration: underline;
}

.haiku-signature {
    font-style: italic;
    color: var(--clr-muted);
}