/**
 * Layout styles: Page structure and responsive grid
 */

/* Page layout */
body {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Header */
.header {
    background-color: var(--color-white);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    padding: var(--spacing-md) var(--spacing-lg);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 800px;
    margin: 0 auto;
}

.logo {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-primary);
    margin: 0;
}

/* Main content */
.main {
    flex: 1;
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-md) var(--spacing-md);
    padding-top: calc(60px + var(--spacing-md)); /* Account for fixed header */
}

.main.has-fixed-input {
    padding-bottom: calc(120px + var(--spacing-xl)); /* Account for fixed input */
}

/* Hero section */
.hero {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.hero-title {
    font-size: var(--font-size-xl);
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.hero-subtitle {
    color: var(--color-text-muted);
    font-size: 1rem;
}

/* Search section */
.search-section {
    margin-bottom: var(--spacing-xl);
}

.search-section.search-section-fixed {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: var(--color-secondary);
    padding: var(--spacing-md) var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
    margin-bottom: 0;
    z-index: 100;
}

.search-section.search-section-fixed .search-form {
    max-width: 800px;
    margin: 0 auto;
}

.search-section.search-section-fixed .search-hint {
    display: none;
}

/* Examples section */
.examples-section {
    margin-bottom: var(--spacing-xl);
}

/* Status section */
.status-section {
    margin-bottom: var(--spacing-xl);
}

/* Answer section */
.answer-section {
    margin-bottom: var(--spacing-xl);
}

/* Error section */
.error-section {
    margin-bottom: var(--spacing-xl);
}

/* Footer */
.footer {
    background-color: var(--color-white);
    border-top: 1px solid rgba(0, 0, 0, 0.1);
    padding: var(--spacing-lg);
    text-align: center;
}

.footer-text {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    margin: 0;
}

/* Responsive breakpoints */

/* Tablet (768px+) */
@media (min-width: 768px) {
    .header {
        padding: var(--spacing-lg) var(--spacing-xl);
    }

    .main {
        padding: var(--spacing-2xl) var(--spacing-xl);
        padding-top: calc(70px + var(--spacing-2xl)); /* Account for fixed header */
    }

    .hero-title {
        font-size: var(--font-size-2xl);
    }

    .hero-subtitle {
        font-size: var(--font-size-lg);
    }
}

/* Desktop (1024px+) */
@media (min-width: 1024px) {
    .main {
        padding: var(--spacing-2xl) var(--spacing-lg);
        padding-top: calc(70px + var(--spacing-2xl)); /* Account for fixed header */
    }

    .hero {
        margin-bottom: var(--spacing-2xl);
    }
}