/* ============================================================
   TRACE Dashboard - style.css
   ============================================================ */

/* ----- CSS Custom Properties ----- */
:root {
    /* Colors */
    --color-bg: #f5f6fa;
    --color-surface: #ffffff;
    --color-border: #e2e5ec;
    --color-text-primary: #1e2330;
    --color-text-secondary: #6b7280;
    --color-text-muted: #9ca3af;
    --color-accent: #4f6ef7;
    --color-accent-hover: #3b5de7;
    --color-accent-light: #eef1fe;
    --color-danger: #ef4444;
    --color-danger-hover: #dc2626;
    --color-dropzone-bg: #f9fafb;
    --color-dropzone-border: #cbd5e1;
    --color-dropzone-active-border: var(--color-accent);
    --color-dropzone-active-bg: var(--color-accent-light);

    /* Typography */
    --font-family: "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN",
        "Hiragino Sans", Meiryo, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.8125rem;
    --font-size-base: 0.9375rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.5rem;
    --font-size-2xl: 2rem;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 2.5rem;
    --space-3xl: 3rem;

    /* Layout */
    --max-width: 1280px;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06), 0 1px 4px rgba(0, 0, 0, 0.04);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
}

/* ----- Reset & Base ----- */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    color: var(--color-text-primary);
    background-color: var(--color-bg);
    line-height: 1.6;
    min-height: 100vh;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* ----- Utility ----- */
[hidden] {
    display: none !important;
}

/* ============================================================
   Header
   ============================================================ */
.header {
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-lg) var(--space-xl);
}

.header__title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    letter-spacing: 0.04em;
    color: var(--color-text-primary);
    max-width: var(--max-width);
    margin: 0 auto;
}

.header__subtitle {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    max-width: var(--max-width);
    margin: var(--space-xs) auto 0;
}

/* ============================================================
   Main
   ============================================================ */
.main {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--space-xl) var(--space-xl) var(--space-3xl);
}

/* ============================================================
   Upload Section
   ============================================================ */
.upload-section {
    margin-bottom: var(--space-xl);
}

/* --- Dropzone --- */
.upload-dropzone {
    border: 2px dashed var(--color-dropzone-border);
    border-radius: var(--radius-lg);
    background-color: var(--color-dropzone-bg);
    padding: var(--space-3xl) var(--space-xl);
    text-align: center;
    transition: border-color var(--transition-fast),
        background-color var(--transition-fast);
    cursor: pointer;
}

.upload-dropzone--active {
    border-color: var(--color-dropzone-active-border);
    background-color: var(--color-dropzone-active-bg);
}

.upload-dropzone__icon {
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
}

.upload-dropzone__text {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--space-xs);
}

.upload-dropzone__subtext {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
}

.upload-dropzone__button {
    display: inline-block;
    padding: var(--space-sm) var(--space-lg);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-accent);
    background-color: var(--color-accent-light);
    border-radius: var(--radius-sm);
    transition: background-color var(--transition-fast),
        color var(--transition-fast);
}

.upload-dropzone__button:hover {
    background-color: var(--color-accent);
    color: #ffffff;
}

/* --- Uploaded Files --- */
.uploaded-files {
    margin-top: var(--space-lg);
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    box-shadow: var(--shadow-sm);
}

.uploaded-files__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-md);
}

.uploaded-files__title {
    font-size: var(--font-size-base);
    font-weight: 600;
}

.uploaded-files__clear {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-danger);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    transition: background-color var(--transition-fast);
}

.uploaded-files__clear:hover {
    background-color: #fef2f2;
}

.uploaded-files__list {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.uploaded-files__item {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    background-color: var(--color-bg);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
}

.uploaded-files__item-date {
    font-weight: 600;
    color: var(--color-text-primary);
}

/* ============================================================
   Dashboard
   ============================================================ */
.dashboard {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

/* ============================================================
   Filter Section
   ============================================================ */
.filter-section {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    box-shadow: var(--shadow-sm);
}

.filter-section__title {
    font-size: var(--font-size-base);
    font-weight: 600;
    margin-bottom: var(--space-md);
}

.filter-section__controls {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.filter-section__range-info {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.filter-section__inputs {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.filter-section__label {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.filter-section__date-input {
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    padding: var(--space-sm) var(--space-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background-color: var(--color-surface);
    color: var(--color-text-primary);
    outline: none;
    transition: border-color var(--transition-fast);
}

.filter-section__date-input:focus {
    border-color: var(--color-accent);
}

.filter-section__separator {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

/* ============================================================
   Summary Section
   ============================================================ */
.summary-section {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: var(--space-md);
}

.summary-card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    box-shadow: var(--shadow-sm);
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-height: 120px;
}

.summary-card__label {
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: var(--space-sm);
}

.summary-card__value {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-text-primary);
    line-height: 1.2;
}

.summary-card__value--text {
    font-size: var(--font-size-lg);
    word-break: break-all;
}

.summary-card__unit {
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
    margin-top: var(--space-xs);
}

/* ============================================================
   Charts Section
   ============================================================ */
.charts-section {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

.charts-row--two-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
}

.charts-row--full {
    display: grid;
    grid-template-columns: 1fr;
}

/* --- Chart Container --- */
.chart-container {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.chart-container__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) var(--space-lg);
    border-bottom: 1px solid var(--color-border);
}

.chart-container__title {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-text-primary);
}

.chart-container__back-button {
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--color-accent);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    transition: background-color var(--transition-fast);
}

.chart-container__back-button:hover {
    background-color: var(--color-accent-light);
}

.chart-container__body {
    width: 100%;
    height: 380px;
    padding: var(--space-md);
}

.chart-container__body--calendar {
    height: 280px;
}

.chart-container__body--ranking {
    height: 480px;
}

/* ============================================================
   Error Toast
   ============================================================ */
.toast {
    position: fixed;
    bottom: var(--space-xl);
    right: var(--space-xl);
    background-color: var(--color-text-primary);
    color: #ffffff;
    font-size: var(--font-size-sm);
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    z-index: 9999;
    opacity: 0;
    transform: translateY(12px);
    transition: opacity var(--transition-base), transform var(--transition-base);
    pointer-events: none;
}

.toast--visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.toast--error {
    background-color: var(--color-danger);
}

/* ============================================================
   Responsive (minimal - PC focus)
   ============================================================ */
@media (max-width: 1024px) {
    .summary-section {
        grid-template-columns: repeat(3, 1fr);
    }

    .charts-row--two-col {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .summary-section {
        grid-template-columns: repeat(2, 1fr);
    }

    .filter-section__controls {
        flex-direction: column;
        align-items: flex-start;
    }
}