/* ═══════════════════════════════════════════════════════════
   memo - 覚えておかなくていいメモ
   CSS Design System
   ═══════════════════════════════════════════════════════════ */

/* ─── Design Tokens ─────────────────────────────────────── */

:root {
    /* Colors */
    --color-bg: #f6f5f1;
    --color-surface: #ffffff;
    --color-text: #1c1c1e;
    --color-text-secondary: #86868b;
    --color-text-tertiary: #aeaeb2;
    --color-accent: #6366f1;
    --color-accent-hover: #4f46e5;
    --color-accent-light: #eef2ff;
    --color-accent-subtle: rgba(99, 102, 241, 0.08);
    --color-pin: #f59e0b;
    --color-pin-bg: #fffbeb;
    --color-border: #e5e5e0;
    --color-border-focus: #c7c7c2;
    --color-danger: #ef4444;
    --color-danger-hover: #dc2626;
    --color-success: #10b981;
    --color-overlay: rgba(0, 0, 0, 0.3);
    --color-toast-bg: #1c1c1e;
    --color-toast-text: #ffffff;

    /* Shadows */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    --shadow-menu: 0 4px 16px rgba(0, 0, 0, 0.14), 0 1px 4px rgba(0, 0, 0, 0.06);

    /* Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-full: 9999px;

    /* Spacing */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;

    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.5rem;
    --line-height: 1.6;

    /* Layout */
    --max-width: 640px;
    --header-height: 56px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
}


/* ─── Reset & Base ──────────────────────────────────────── */

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

html {
    -webkit-text-size-adjust: 100%;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: var(--line-height);
    color: var(--color-text);
    background-color: var(--color-bg);
    min-height: 100dvh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Screen reader only */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}


/* ─── Buttons ───────────────────────────────────────────── */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    padding: 10px 20px;
    font-family: inherit;
    font-size: var(--font-size-sm);
    font-weight: 600;
    line-height: 1;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    user-select: none;
    -webkit-user-select: none;
}

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

.btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    transform: none;
}

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

.btn-primary:hover:not(:disabled) {
    background-color: var(--color-accent-hover);
}

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

.btn-ghost:hover:not(:disabled) {
    background-color: var(--color-accent-subtle);
    color: var(--color-text);
}

.btn-sm {
    padding: 6px 14px;
    font-size: var(--font-size-xs);
}

.btn-full {
    width: 100%;
}

.icon-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    padding: 0;
    background: none;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.icon-btn:hover {
    background-color: var(--color-accent-subtle);
    color: var(--color-text);
}

.icon-btn:active {
    transform: scale(0.93);
}

.icon-btn-sm {
    width: 32px;
    height: 32px;
}


/* ─── Login Page ────────────────────────────────────────── */

.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100dvh;
    padding: var(--space-lg);
}

.login-card {
    width: 100%;
    max-width: 380px;
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl) var(--space-lg);
    box-shadow: var(--shadow-md);
}

.login-header {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.login-icon {
    font-size: 2.5rem;
    display: block;
    margin-bottom: var(--space-sm);
}

.login-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--color-text);
}

.login-subtitle {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-top: var(--space-xs);
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.form-group input[type="password"] {
    width: 100%;
    padding: 12px var(--space-md);
    font-family: inherit;
    font-size: var(--font-size-base);
    color: var(--color-text);
    background-color: var(--color-bg);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    outline: none;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-group input[type="password"]:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px var(--color-accent-subtle);
}

.form-group input[type="password"]::placeholder {
    color: var(--color-text-tertiary);
}

/* Custom Checkbox */
.checkbox-group {
    display: flex;
    align-items: center;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    cursor: pointer;
    user-select: none;
    -webkit-user-select: none;
}

.checkbox-label input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.checkbox-custom {
    width: 18px;
    height: 18px;
    border: 2px solid var(--color-border);
    border-radius: 4px;
    transition: all var(--transition-fast);
    position: relative;
    flex-shrink: 0;
}

.checkbox-label input[type="checkbox"]:checked + .checkbox-custom {
    background-color: var(--color-accent);
    border-color: var(--color-accent);
}

.checkbox-label input[type="checkbox"]:checked + .checkbox-custom::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 5px;
    width: 5px;
    height: 8px;
    border: solid #ffffff;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.checkbox-label input[type="checkbox"]:focus-visible + .checkbox-custom {
    box-shadow: 0 0 0 3px var(--color-accent-subtle);
}

.login-error {
    padding: 10px var(--space-md);
    font-size: var(--font-size-sm);
    color: var(--color-danger);
    background-color: #fef2f2;
    border-radius: var(--radius-sm);
    text-align: center;
}


/* ─── Header ────────────────────────────────────────────── */

.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(246, 245, 241, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-md);
    height: var(--header-height);
}

.header-left {
    display: flex;
    align-items: center;
}

.app-title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--color-text);
}

.header-right {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}


/* ─── Search Bar ────────────────────────────────────────── */

.search-bar {
    border-top: 1px solid var(--color-border);
    overflow: hidden;
    animation: slideDown var(--transition-base);
}

.search-bar[hidden] {
    display: none;
}

.search-bar-inner {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--space-sm) var(--space-md);
}

.search-icon {
    flex-shrink: 0;
    color: var(--color-text-tertiary);
}

.search-input {
    flex: 1;
    padding: 8px 0;
    font-family: inherit;
    font-size: var(--font-size-base);
    color: var(--color-text);
    background: none;
    border: none;
    outline: none;
}

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

.search-input::-webkit-search-cancel-button {
    display: none;
}

@keyframes slideDown {
    from {
        max-height: 0;
        opacity: 0;
    }
    to {
        max-height: 60px;
        opacity: 1;
    }
}


/* ─── Main Content ──────────────────────────────────────── */

.main {
    padding-bottom: var(--space-2xl);
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-md);
}


/* ─── Input Section ─────────────────────────────────────── */

.input-section {
    padding: var(--space-lg) 0 var(--space-md);
}

.section-label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-sm);
}

.input-area {
    position: relative;
}

.memo-textarea {
    width: 100%;
    padding: 12px var(--space-md);
    font-family: inherit;
    font-size: var(--font-size-base);
    line-height: var(--line-height);
    color: var(--color-text);
    background-color: var(--color-surface);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    outline: none;
    resize: none;
    overflow: hidden;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    min-height: 68px;
}

.memo-textarea:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px var(--color-accent-subtle);
}

.memo-textarea::placeholder {
    color: var(--color-text-tertiary);
}

.input-actions {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: var(--space-sm);
    margin-top: var(--space-sm);
}

.save-feedback {
    font-size: var(--font-size-sm);
    color: var(--color-success);
    font-weight: 500;
    animation: feedbackFade 1.5s ease forwards;
}

@keyframes feedbackFade {
    0%   { opacity: 1; }
    70%  { opacity: 1; }
    100% { opacity: 0; }
}


/* ─── Memo Sections ─────────────────────────────────────── */

.memo-section {
    margin-top: var(--space-sm);
}

.memo-section[hidden] {
    display: none;
}

.section-divider {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) 0 var(--space-sm);
}

.section-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background-color: var(--color-border);
}

.section-divider-label {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-text-secondary);
    white-space: nowrap;
}

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


/* ─── Memo Card ─────────────────────────────────────────── */

.memo-card {
    position: relative;
    background-color: var(--color-surface);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(0, 0, 0, 0.04);
    cursor: pointer;
    transition: box-shadow var(--transition-fast), transform var(--transition-fast);
    animation: cardAppear var(--transition-slow) ease;
}

.memo-card.is-pinned {
    border-left: 3px solid var(--color-pin);
}

.memo-card.is-editing {
    cursor: default;
    box-shadow: var(--shadow-md);
    border-color: var(--color-accent);
}

.memo-card.is-deleting {
    animation: cardDelete var(--transition-base) ease forwards;
}

@keyframes cardAppear {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes cardDelete {
    to {
        opacity: 0;
        transform: translateX(-16px);
        max-height: 0;
        padding: 0;
        margin: 0;
        border: 0;
        overflow: hidden;
    }
}

/* PC hover effect */
@media (hover: hover) {
    .memo-card:not(.is-editing):hover {
        box-shadow: var(--shadow-md);
        transform: translateY(-1px);
    }
}

.memo-card-content {
    font-size: var(--font-size-base);
    line-height: var(--line-height);
    color: var(--color-text);
    white-space: pre-wrap;
    word-break: break-word;
    padding-right: var(--space-lg);
}

.memo-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: var(--space-sm);
}

.memo-date {
    font-size: var(--font-size-xs);
    color: var(--color-text-tertiary);
}

.memo-menu-btn {
    position: absolute;
    top: var(--space-sm);
    right: var(--space-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    padding: 0;
    background: none;
    border: none;
    border-radius: var(--radius-sm);
    font-size: var(--font-size-lg);
    color: var(--color-text-tertiary);
    cursor: pointer;
    transition: all var(--transition-fast);
    opacity: 0;
}

.memo-card:hover .memo-menu-btn,
.memo-card .memo-menu-btn:focus,
.memo-card.menu-open .memo-menu-btn {
    opacity: 1;
}

/* モバイルでは常時表示 */
@media (hover: none) {
    .memo-menu-btn {
        opacity: 1;
    }
}

.memo-menu-btn:hover {
    background-color: var(--color-accent-subtle);
    color: var(--color-text);
}


/* ─── Memo Menu ─────────────────────────────────────────── */

.memo-menu {
    position: absolute;
    top: 44px;
    right: var(--space-sm);
    min-width: 160px;
    background-color: var(--color-surface);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-menu);
    border: 1px solid var(--color-border);
    padding: var(--space-xs);
    z-index: 50;
    animation: menuAppear var(--transition-fast) ease;
}

.memo-menu[hidden] {
    display: none;
}

@keyframes menuAppear {
    from {
        opacity: 0;
        transform: scale(0.95) translateY(-4px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.memo-menu-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    width: 100%;
    padding: 10px 12px;
    font-family: inherit;
    font-size: var(--font-size-sm);
    color: var(--color-text);
    background: none;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: background-color var(--transition-fast);
    text-align: left;
}

.memo-menu-item:hover {
    background-color: var(--color-accent-subtle);
}

.memo-menu-item.memo-delete-btn:hover {
    background-color: #fef2f2;
    color: var(--color-danger);
}

.memo-menu-icon {
    font-size: var(--font-size-base);
    width: 20px;
    text-align: center;
    flex-shrink: 0;
}


/* ─── Memo Edit Mode ────────────────────────────────────── */

.memo-edit {
    margin-top: var(--space-sm);
}

.memo-edit[hidden] {
    display: none;
}

.memo-edit-textarea {
    width: 100%;
    padding: 10px 12px;
    font-family: inherit;
    font-size: var(--font-size-base);
    line-height: var(--line-height);
    color: var(--color-text);
    background-color: var(--color-bg);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    outline: none;
    resize: none;
    overflow: hidden;
    transition: border-color var(--transition-fast);
}

.memo-edit-textarea:focus {
    border-color: var(--color-accent);
}

.memo-edit-actions {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: var(--space-sm);
    margin-top: var(--space-sm);
}


/* ─── Empty State ───────────────────────────────────────── */

.empty-state {
    text-align: center;
    padding: var(--space-2xl) var(--space-md);
}

.empty-state[hidden] {
    display: none;
}

.empty-icon {
    font-size: 2.5rem;
    display: block;
    margin-bottom: var(--space-sm);
    opacity: 0.6;
}

.empty-text {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    font-weight: 500;
}

.empty-hint {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
    margin-top: var(--space-xs);
}


/* ─── Toast ─────────────────────────────────────────────── */

.toast {
    position: fixed;
    bottom: var(--space-lg);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    max-width: calc(100% - var(--space-xl));
    padding: 12px var(--space-md);
    background-color: var(--color-toast-bg);
    color: var(--color-toast-text);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    z-index: 200;
    animation: toastIn var(--transition-base) ease;
}

.toast[hidden] {
    display: none;
}

.toast.is-hiding {
    animation: toastOut var(--transition-base) ease forwards;
}

@keyframes toastIn {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

@keyframes toastOut {
    to {
        opacity: 0;
        transform: translateX(-50%) translateY(12px);
    }
}

.toast-message {
    font-size: var(--font-size-sm);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.toast-undo {
    padding: 4px 10px;
    font-family: inherit;
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-accent-light);
    background: none;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    white-space: nowrap;
    transition: opacity var(--transition-fast);
}

.toast-undo:hover {
    opacity: 0.8;
}

.toast-undo[hidden] {
    display: none;
}

.toast-close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    padding: 0;
    background: none;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--color-text-tertiary);
    cursor: pointer;
    flex-shrink: 0;
    transition: color var(--transition-fast);
}

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


/* ─── Load More ─────────────────────────────────────────── */

.load-more {
    margin-top: var(--space-md);
    color: var(--color-accent);
}

.load-more[hidden] {
    display: none;
}


/* ─── Search Result Count ───────────────────────────────── */

.search-count {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
    text-align: center;
    padding: var(--space-sm) 0;
}


/* ─── Login form button loading state ───────────────────── */

.btn-loading {
    position: relative;
    pointer-events: none;
    color: transparent !important;
}

.btn-loading::after {
    content: '';
    position: absolute;
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: #ffffff;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}


/* ─── Responsive: Tablet+ ──────────────────────────────── */

@media (min-width: 768px) {
    .login-card {
        padding: var(--space-2xl) var(--space-xl);
    }

    .container {
        padding: 0 var(--space-lg);
    }

    .input-section {
        padding-top: var(--space-xl);
    }
}