/* ===== CSS Custom Properties ===== */
:root {
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

    /* Colors */
    --color-bg: #f8fafc;
    --color-surface: #ffffff;
    --color-border: #e2e8f0;
    --color-border-strong: #cbd5e1;
    --color-text: #1e293b;
    --color-text-muted: #64748b;
    --color-text-placeholder: #94a3b8;

    /* Accent colors */
    --color-primary: #3b82f6;
    --color-primary-hover: #2563eb;
    --color-primary-light: #eff6ff;
    --color-danger: #ef4444;
    --color-danger-hover: #dc2626;
    --color-success: #10b981;

    /* Cell type colors */
    --color-main-goal-bg: #fef08a;
    --color-main-goal-border: #eab308;
    --color-pillar-bg: #e0e7ff;
    --color-pillar-border: #6366f1;
    --color-action-bg: #ffffff;
    --color-action-border: #cbd5e1;

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

    /* Border radius */
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 10px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);

    /* Grid sizing */
    --grid-gap: 2px;
    --section-gap: 6px;
    --cell-size: 80px;
}

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

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

body {
    font-family: var(--font-family);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.4;
    min-height: 100vh;
    padding: var(--spacing-md);
}

/* ===== Container ===== */
.container {
    max-width: 1000px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

/* ===== Header ===== */
.header {
    text-align: center;
}

.header-main {
    margin-bottom: var(--spacing-sm);
}

.title-input {
    font-family: var(--font-family);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
    background: transparent;
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    padding: var(--spacing-xs) var(--spacing-md);
    text-align: center;
    width: 100%;
    max-width: 500px;
    transition: border-color 0.2s, background-color 0.2s;
}

.title-input:hover {
    background-color: var(--color-surface);
}

.title-input:focus {
    outline: none;
    border-color: var(--color-primary);
    background-color: var(--color-surface);
}

.title-input::placeholder {
    color: var(--color-text-placeholder);
}

.header-meta {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.meta-field {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.meta-field label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-muted);
}

.meta-input {
    font-family: var(--font-family);
    font-size: 0.875rem;
    color: var(--color-text);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
    width: 140px;
    transition: border-color 0.2s;
}

.meta-input:focus {
    outline: none;
    border-color: var(--color-primary);
}

/* ===== Instructions ===== */
.instructions {
    background: var(--color-primary-light);
    border: 1px solid var(--color-primary);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.85rem;
}

.instructions summary {
    cursor: pointer;
    font-weight: 600;
    color: var(--color-primary);
}

.instructions ol {
    margin-top: var(--spacing-sm);
    padding-left: var(--spacing-lg);
}

.instructions li {
    margin-bottom: var(--spacing-xs);
}

/* ===== Grid Container ===== */
.grid-container {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-md);
    overflow-x: auto;
}

/* ===== 9x9 Harada Grid ===== */
.harada-grid {
    display: grid;
    grid-template-columns: repeat(9, minmax(var(--cell-size), 1fr));
    grid-template-rows: repeat(9, minmax(var(--cell-size), 1fr));
    gap: var(--grid-gap);
    min-width: 720px;
}

/* Section borders - visual grouping of 3x3 blocks */
.harada-grid {
    background:
        /* Vertical lines */
        linear-gradient(to right, var(--color-border-strong) var(--section-gap), transparent var(--section-gap)) 33.33%,
        linear-gradient(to right, var(--color-border-strong) var(--section-gap), transparent var(--section-gap)) 66.66%,
        /* Horizontal lines */
        linear-gradient(to bottom, var(--color-border-strong) var(--section-gap), transparent var(--section-gap)) 33.33%,
        linear-gradient(to bottom, var(--color-border-strong) var(--section-gap), transparent var(--section-gap)) 66.66%;
}

/* ===== Grid Cells ===== */
.grid-cell {
    position: relative;
}

.cell-content {
    font-family: var(--font-family);
    font-size: 0.7rem;
    line-height: 1.3;
    color: var(--color-text);
    background: var(--color-action-bg);
    border: 1px solid var(--color-action-border);
    border-radius: var(--radius-sm);
    padding: var(--spacing-sm);
    width: 100%;
    height: 100%;
    min-height: var(--cell-size);
    transition: border-color 0.2s, box-shadow 0.2s;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    word-break: break-word;
    overflow: hidden;
    cursor: text;
}

.cell-content:hover {
    border-color: var(--color-border-strong);
}

.cell-content:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 2px var(--color-primary-light);
    z-index: 1;
}

/* Placeholder for empty cells */
.cell-content:empty::before {
    content: attr(data-placeholder);
    color: var(--color-text-placeholder);
    font-size: 0.65rem;
    pointer-events: none;
}

/* ===== Main Goal Cell (Center) ===== */
.cell-main-goal .cell-content {
    background: var(--color-main-goal-bg);
    border: 2px solid var(--color-main-goal-border);
    font-weight: 700;
    font-size: 0.8rem;
}

.cell-main-goal .cell-content:focus {
    border-color: var(--color-main-goal-border);
    box-shadow: 0 0 0 3px rgba(234, 179, 8, 0.3);
}

/* ===== Pillar Cells ===== */
.cell-pillar .cell-content {
    background: var(--color-pillar-bg);
    border: 2px solid var(--color-pillar-border);
    font-weight: 600;
    font-size: 0.75rem;
}

.cell-pillar .cell-content:focus {
    border-color: var(--color-pillar-border);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.3);
}

/* Pillar mirrors (read-only, synced copies) */
.cell-pillar-mirror .cell-content {
    background: var(--color-pillar-bg);
    border: 2px solid var(--color-pillar-border);
    font-weight: 600;
    font-size: 0.75rem;
    opacity: 0.9;
    cursor: default;
}

/* ===== Legend ===== */
.legend {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.legend-color {
    width: 16px;
    height: 16px;
    border-radius: var(--radius-sm);
    border: 1px solid;
}

.main-goal-legend {
    background: var(--color-main-goal-bg);
    border-color: var(--color-main-goal-border);
}

.pillar-legend {
    background: var(--color-pillar-bg);
    border-color: var(--color-pillar-border);
}

.action-legend {
    background: var(--color-action-bg);
    border-color: var(--color-action-border);
}

/* ===== Action Buttons ===== */
.actions {
    display: flex;
    justify-content: space-between;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.action-group {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-family: var(--font-family);
    font-size: 0.8rem;
    font-weight: 500;
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}

.btn svg {
    flex-shrink: 0;
}

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

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

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

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

.btn-danger {
    background: var(--color-danger);
    color: white;
}

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

.btn-outline {
    background: transparent;
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.btn-outline:hover {
    background: var(--color-bg);
    border-color: var(--color-border-strong);
}

/* ===== GitHub Link ===== */
.github-link {
    text-align: center;
}

.github-link a {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: 0.8rem;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    transition: color 0.2s, background 0.2s;
}

.github-link a:hover {
    color: var(--color-text);
    background: var(--color-bg);
}

/* ===== Status Indicator ===== */
.status {
    position: fixed;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--color-text);
    color: white;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-size: 0.8rem;
    font-weight: 500;
    opacity: 0;
    transition: transform 0.3s, opacity 0.3s;
    pointer-events: none;
    z-index: 1000;
}

.status.visible {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

.status.success {
    background: var(--color-success);
}

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

/* ===== Modal ===== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
    z-index: 1001;
    backdrop-filter: blur(4px);
}

.modal-overlay[hidden] {
    display: none;
}

.modal {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 450px;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    animation: modalIn 0.2s ease-out;
}

@keyframes modalIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }

    to {
        opacity: 1;
        transform: scale(1);
    }
}

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

.modal-header h2 {
    font-size: 1rem;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--color-text-muted);
    cursor: pointer;
    padding: 0;
    line-height: 1;
}

.modal-close:hover {
    color: var(--color-text);
}

.modal-content {
    padding: var(--spacing-lg);
    overflow-y: auto;
}

.template-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.template-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    background: var(--color-bg);
    border-radius: var(--radius-md);
    transition: background 0.2s;
}

.template-item:hover {
    background: var(--color-border);
}

.template-info {
    flex: 1;
    cursor: pointer;
}

.template-name {
    font-weight: 500;
    color: var(--color-text);
}

.template-date {
    font-size: 0.7rem;
    color: var(--color-text-muted);
    margin-top: var(--spacing-xs);
}

.template-delete {
    background: none;
    border: none;
    color: var(--color-text-muted);
    cursor: pointer;
    padding: var(--spacing-xs);
}

.template-delete:hover {
    color: var(--color-danger);
}

.empty-state {
    text-align: center;
    color: var(--color-text-muted);
    padding: var(--spacing-xl);
}

/* ===== Responsive Design ===== */
@media (max-width: 900px) {
    :root {
        --cell-size: 70px;
    }

    .harada-grid {
        min-width: 630px;
    }
}

@media (max-width: 700px) {
    :root {
        --cell-size: 60px;
    }

    body {
        padding: var(--spacing-sm);
    }

    .harada-grid {
        min-width: 540px;
    }

    .grid-cell textarea {
        font-size: 0.6rem;
    }

    .actions {
        flex-direction: column;
    }

    .action-group {
        justify-content: center;
    }
}

/* ===== Print Styles ===== */
@media print {
    * {
        -webkit-print-color-adjust: exact !important;
        print-color-adjust: exact !important;
    }

    body {
        background: white !important;
        padding: 0;
        margin: 0;
    }

    .container {
        max-width: 100%;
        gap: 0.5rem;
    }

    .no-print {
        display: none !important;
    }

    .title-input,
    .meta-input {
        border: none !important;
        background: transparent !important;
        padding: 0;
    }

    .title-input {
        font-size: 1.25rem;
    }

    .grid-container {
        box-shadow: none;
        padding: 0.5rem;
        page-break-inside: avoid;
    }

    .harada-grid {
        min-width: unset;
        gap: 1px;
    }

    :root {
        --cell-size: 65px;
    }

    .cell-content {
        border: 1px solid #333 !important;
        font-size: 0.55rem;
        min-height: 60px;
        overflow: hidden;
    }

    .cell-main-goal .cell-content {
        border: 2px solid #333 !important;
        background: #fff3cd !important;
    }

    .cell-pillar .cell-content,
    .cell-pillar-mirror .cell-content {
        border: 2px solid #555 !important;
        background: #e8e8ff !important;
    }

    .status,
    .modal-overlay {
        display: none !important;
    }

    @page {
        size: landscape;
        margin: 0.5cm;
    }
}

/* A4 Landscape adjustments */
@media print and (min-width: 297mm) {
    :root {
        --cell-size: 70px;
    }
}