/**
 * Google Material Design System for Kobetu Project
 * Complete CSS utility library for Material Design
 * Based on Google's Material Design Guidelines
 */

/* ========================================
   CSS Custom Properties (Variables)
   ======================================== */

:root {
    /* Primary Colors - Light Mode */
    --md-blue: #1976D2;
    --md-green: #4CAF50;
    --md-indigo: #3F51B5;
    --md-orange: #FF9800;
    --md-pink: #E91E63;
    --md-purple: #9C27B0;
    --md-red: #F44336;
    --md-teal: #009688;
    --md-yellow: #FFEB3B;

    /* Legacy Project Colors Mapped to Material Design Colors */
    --primary-purple: #667eea;        /* Primary brand color */
    --primary-purple-dark: #764ba2;   /* Gradient end */
    --success-green: #4CAF50;         /* Success states */
    --danger-red: #F44336;            /* Danger/Delete */
    --info-blue: #1976D2;             /* Info/Links */
    --secondary-gray: #757575;        /* Secondary elements */

    /* Grays - Light Mode */
    --md-gray: #757575;
    --md-gray-2: #9E9E9E;
    --md-gray-3: #BDBDBD;
    --md-gray-4: #E0E0E0;
    --md-gray-5: #EEEEEE;
    --md-gray-6: #FAFAFA;

    /* Text Colors */
    --text-primary: rgba(0, 0, 0, 0.87);
    --text-secondary: rgba(0, 0, 0, 0.60);
    --text-tertiary: rgba(0, 0, 0, 0.38);

    /* Backgrounds - Light Mode */
    --md-bg-primary: #FFFFFF;
    --md-bg-secondary: #FAFAFA;
    --md-bg-tertiary: #FFFFFF;
    --md-bg-elevated: #FFFFFF;

    /* Semantic Colors for Grades */
    --grade-elementary: #4CAF50;      /* 小学生: 緑 */
    --grade-junior-high: #1976D2;     /* 中学生: 青 */
    --grade-high-school: #F44336;     /* 高校生: 赤 */

    /* Status Colors */
    --status-active: #4CAF50;
    --status-pending: #FF9800;
    --status-inactive: #757575;
    --status-error: #F44336;
    --status-info: #1976D2;

    /* Typography */
    --font-thin: 100;
    --font-ultralight: 200;
    --font-light: 300;
    --font-regular: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;
    --font-heavy: 800;
    --font-black: 900;

    /* Font Sizes */
    --text-large-title: 34px;
    --text-title-1: 28px;
    --text-title-2: 22px;
    --text-title-3: 20px;
    --text-headline: 17px;
    --text-body: 17px;
    --text-callout: 16px;
    --text-subhead: 15px;
    --text-footnote: 13px;
    --text-caption-1: 12px;
    --text-caption-2: 11px;

    /* Spacing - 8pt Grid System */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    --spacing-3xl: 64px;
    --spacing-4xl: 96px;
    --spacing-5xl: 128px;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-2xl: 24px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1);
    --shadow-2xl: 0 25px 50px rgba(0, 0, 0, 0.15);

    /* Animations */
    --ease-in-out: cubic-bezier(0.42, 0, 0.58, 1);
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-in: cubic-bezier(0.32, 0, 0.67, 0);
    --ease-spring: cubic-bezier(0.68, -0.55, 0.265, 1.55);

    --duration-instant: 100ms;
    --duration-fast: 200ms;
    --duration-normal: 300ms;
    --duration-slow: 500ms;
    --duration-slower: 700ms;
}

/* ========================================
   Reset & Base Styles
   ======================================== */

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    color-scheme: light;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--md-bg-secondary);
    margin: 0;
    padding: 0;
}

/* ========================================
   Typography Utilities
   ======================================== */

h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-bold);
    line-height: 1.2;
    margin-top: 0;
}

h1 { font-size: var(--text-large-title); letter-spacing: -0.02em; }
h2 { font-size: var(--text-title-1); letter-spacing: -0.01em; }
h3 { font-size: var(--text-title-2); }
h4 { font-size: var(--text-title-3); }
h5 { font-size: var(--text-headline); }
h6 { font-size: var(--text-body); }

p {
    margin-top: 0;
    margin-bottom: var(--spacing-md);
}

.text-large-title {
    font-size: var(--text-large-title);
    font-weight: var(--font-bold);
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.text-title-1 {
    font-size: var(--text-title-1);
    font-weight: var(--font-bold);
    letter-spacing: -0.01em;
    line-height: 1.3;
}

.text-title-2 {
    font-size: var(--text-title-2);
    font-weight: var(--font-bold);
    line-height: 1.3;
}

.text-title-3 {
    font-size: var(--text-title-3);
    font-weight: var(--font-semibold);
    line-height: 1.4;
}

.text-body {
    font-size: var(--text-body);
    font-weight: var(--font-regular);
    line-height: 1.6;
}

.text-callout {
    font-size: var(--text-callout);
    font-weight: var(--font-regular);
    line-height: 1.5;
}

.text-subhead {
    font-size: var(--text-subhead);
    font-weight: var(--font-regular);
    line-height: 1.5;
}

.text-footnote {
    font-size: var(--text-footnote);
    font-weight: var(--font-regular);
    line-height: 1.4;
}

.text-caption {
    font-size: var(--text-caption-1);
    font-weight: var(--font-regular);
    line-height: 1.4;
}

/* ========================================
   Color Utilities
   ======================================== */

.text-blue { color: var(--md-blue); }
.text-green { color: var(--md-green); }
.text-red { color: var(--md-red); }
.text-orange { color: var(--md-orange); }
.text-purple { color: var(--md-purple); }
.text-gray { color: var(--md-gray); }
.text-primary { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }

.bg-blue { background-color: var(--md-blue); }
.bg-green { background-color: var(--md-green); }
.bg-red { background-color: var(--md-red); }
.bg-orange { background-color: var(--md-orange); }
.bg-purple { background-color: var(--md-purple); }
.bg-gray { background-color: var(--md-gray-6); }
.bg-primary { background-color: var(--md-bg-primary); }
.bg-secondary { background-color: var(--md-bg-secondary); }

/* ========================================
   Layout Utilities
   ======================================== */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.container-fluid {
    width: 100%;
    padding: 0 var(--spacing-lg);
}

.flex {
    display: flex;
}

.flex-col {
    display: flex;
    flex-direction: column;
}

.flex-center {
    display: flex;
    justify-content: center;
    align-items: center;
}

.flex-between {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.grid {
    display: grid;
    gap: var(--spacing-lg);
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

/* ========================================
   Spacing Utilities
   ======================================== */

.p-xs { padding: var(--spacing-xs); }
.p-sm { padding: var(--spacing-sm); }
.p-md { padding: var(--spacing-md); }
.p-lg { padding: var(--spacing-lg); }
.p-xl { padding: var(--spacing-xl); }
.p-2xl { padding: var(--spacing-2xl); }

.px-sm { padding-left: var(--spacing-sm); padding-right: var(--spacing-sm); }
.px-md { padding-left: var(--spacing-md); padding-right: var(--spacing-md); }
.px-lg { padding-left: var(--spacing-lg); padding-right: var(--spacing-lg); }

.py-sm { padding-top: var(--spacing-sm); padding-bottom: var(--spacing-sm); }
.py-md { padding-top: var(--spacing-md); padding-bottom: var(--spacing-md); }
.py-lg { padding-top: var(--spacing-lg); padding-bottom: var(--spacing-lg); }

.m-xs { margin: var(--spacing-xs); }
.m-sm { margin: var(--spacing-sm); }
.m-md { margin: var(--spacing-md); }
.m-lg { margin: var(--spacing-lg); }
.m-xl { margin: var(--spacing-xl); }
.m-2xl { margin: var(--spacing-2xl); }

.mx-auto { margin-left: auto; margin-right: auto; }
.my-sm { margin-top: var(--spacing-sm); margin-bottom: var(--spacing-sm); }
.my-md { margin-top: var(--spacing-md); margin-bottom: var(--spacing-md); }
.my-lg { margin-top: var(--spacing-lg); margin-bottom: var(--spacing-lg); }

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }

.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }

/* ========================================
   Glassmorphism Effects
   ======================================== */

.glass {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.glass-dark {
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.glass-strong {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(30px) saturate(200%);
    -webkit-backdrop-filter: blur(30px) saturate(200%);
}

/* ========================================
   Button Styles
   ======================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border-radius: var(--radius-full);
    font-weight: var(--font-semibold);
    font-size: var(--text-body);
    border: none;
    cursor: pointer;
    transition: all var(--duration-normal) var(--ease-out);
    text-decoration: none;
    text-align: center;
    font-family: inherit;
    line-height: 1;
    gap: var(--spacing-sm);
}

.btn:focus {
    outline: 2px solid var(--md-blue);
    outline-offset: 2px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-purple) 0%, var(--primary-purple-dark) 100%);
    color: white;
    border: none;
}

.btn-primary:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-lg);
}

.btn-primary:active {
    transform: scale(0.98);
}

.btn-success {
    background: var(--md-green);
    color: white;
}

.btn-success:hover {
    background: #28a745;
    transform: scale(1.02);
    box-shadow: var(--shadow-lg);
}

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

.btn-danger:hover {
    background: #d32f2f;
    transform: scale(1.02);
    box-shadow: var(--shadow-lg);
}

.btn-info {
    background: var(--md-blue);
    color: white;
}

.btn-info:hover {
    background: #0051D5;
    transform: scale(1.02);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: var(--md-gray);
    color: white;
}

.btn-secondary:hover {
    background: #6c757d;
    transform: scale(1.02);
}

.btn-outline {
    background: transparent;
    color: var(--primary-purple);
    border: 2px solid var(--primary-purple);
}

.btn-outline:hover {
    background: var(--primary-purple);
    color: white;
    transform: scale(1.02);
}

.btn-ghost {
    background: rgba(102, 126, 234, 0.1);
    color: var(--primary-purple);
}

.btn-ghost:hover {
    background: rgba(102, 126, 234, 0.2);
}

.btn-lg {
    padding: 16px 32px;
    font-size: 19px;
}

.btn-sm {
    padding: 8px 16px;
    font-size: 15px;
}

.btn-xs {
    padding: 6px 12px;
    font-size: 13px;
}

/* ========================================
   Card Components
   ======================================== */

.card {
    background: var(--md-bg-primary);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    transition: all var(--duration-normal) var(--ease-out);
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.card-flat {
    box-shadow: none;
    border: 1px solid var(--md-gray-5);
}

.card-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--md-gray-5);
    font-weight: var(--font-semibold);
}

.card-body {
    padding: var(--spacing-lg);
}

.card-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--md-gray-5);
}

/* ========================================
   Header & Navigation
   ======================================== */

.header {
    background: linear-gradient(135deg, var(--primary-purple) 0%, var(--primary-purple-dark) 100%);
    color: white;
    padding: var(--spacing-lg) var(--spacing-xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-md);
}

.header h1 {
    margin: 0;
    font-size: var(--text-title-2);
    font-weight: var(--font-semibold);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.navbar {
    background: var(--md-bg-primary);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--md-gray-5);
    padding: var(--spacing-md) var(--spacing-lg);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-menu {
    background: var(--md-bg-primary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-md);
}

.nav-item {
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    transition: all var(--duration-fast) var(--ease-out);
    cursor: pointer;
    text-decoration: none;
    color: var(--text-primary);
    display: block;
}

.nav-item:hover {
    background: var(--md-gray-6);
}

.nav-item.active {
    background: linear-gradient(135deg, var(--primary-purple) 0%, var(--primary-purple-dark) 100%);
    color: white;
}

/* ========================================
   Table Styles
   ======================================== */

.table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    background: var(--md-bg-primary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.table thead {
    background: var(--md-gray-6);
}

.table th {
    padding: var(--spacing-md) var(--spacing-lg);
    text-align: left;
    font-weight: var(--font-semibold);
    font-size: var(--text-subhead);
    color: var(--text-primary);
    border-bottom: 1px solid var(--md-gray-5);
}

.table td {
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--md-gray-5);
    color: var(--text-primary);
}

.table tbody tr {
    transition: background var(--duration-fast) var(--ease-out);
}

.table tbody tr:hover {
    background: var(--md-gray-6);
}

.table tbody tr:last-child td {
    border-bottom: none;
}

/* ========================================
   Form Elements
   ======================================== */

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: var(--font-medium);
    font-size: var(--text-subhead);
    color: var(--text-primary);
}

.form-control,
input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="date"],
input[type="time"],
input[type="datetime-local"],
textarea,
select {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--md-gray-4);
    border-radius: var(--radius-md);
    font-size: var(--text-body);
    font-family: inherit;
    transition: all var(--duration-fast) var(--ease-out);
    background: var(--md-bg-primary);
    color: var(--text-primary);
}

.form-control:focus,
input:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--md-blue);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.1);
}

textarea {
    resize: vertical;
    min-height: 100px;
}

select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%238E8E93' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

option {
    background: var(--md-bg-primary);
    color: var(--text-primary);
}

/* Checkbox and Radio */
input[type="checkbox"],
input[type="radio"] {
    width: auto;
    margin-right: var(--spacing-sm);
    cursor: pointer;
}

/* ========================================
   Badge & Label
   ======================================== */

.badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: var(--radius-full);
    font-size: var(--text-caption-1);
    font-weight: var(--font-semibold);
    line-height: 1;
}

.badge-primary {
    background: linear-gradient(135deg, var(--primary-purple) 0%, var(--primary-purple-dark) 100%);
    color: white;
}

.badge-success {
    background: var(--md-green);
    color: white;
}

.badge-danger {
    background: var(--md-red);
    color: white;
}

.badge-info {
    background: var(--md-blue);
    color: white;
}

.badge-warning {
    background: var(--md-orange);
    color: white;
}

.badge-secondary {
    background: var(--md-gray);
    color: white;
}

/* Grade Badges */
.badge-elementary {
    background: var(--grade-elementary);
    color: white;
}

.badge-junior-high {
    background: var(--grade-junior-high);
    color: white;
}

.badge-high-school {
    background: var(--grade-high-school);
    color: white;
}

/* ========================================
   Alert & Notification
   ======================================== */

.alert {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    border-left: 4px solid;
}

.alert-success {
    background: rgba(52, 199, 89, 0.1);
    border-color: var(--md-green);
    color: var(--md-green);
}

.alert-danger {
    background: rgba(255, 59, 48, 0.1);
    border-color: var(--md-red);
    color: var(--md-red);
}

.alert-info {
    background: rgba(0, 122, 255, 0.1);
    border-color: var(--md-blue);
    color: var(--md-blue);
}

.alert-warning {
    background: rgba(255, 149, 0, 0.1);
    border-color: var(--md-orange);
    color: var(--md-orange);
}

/* ========================================
   Shadow Utilities
   ======================================== */

.shadow-none { box-shadow: none; }
.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }
.shadow-2xl { box-shadow: var(--shadow-2xl); }

/* ========================================
   Border Radius Utilities
   ======================================== */

.rounded-none { border-radius: 0; }
.rounded-sm { border-radius: var(--radius-sm); }
.rounded-md { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-2xl { border-radius: var(--radius-2xl); }
.rounded-full { border-radius: var(--radius-full); }

/* ========================================
   Animation Utilities
   ======================================== */

.transition {
    transition: all var(--duration-normal) var(--ease-out);
}

.transition-fast {
    transition: all var(--duration-fast) var(--ease-out);
}

.transition-slow {
    transition: all var(--duration-slow) var(--ease-out);
}

.hover-scale:hover {
    transform: scale(1.05);
}

.hover-lift:hover {
    transform: translateY(-4px);
}

/* Fade Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeOut {
    from {
        opacity: 1;
    }
    to {
        opacity: 0;
    }
}

.fade-in {
    animation: fadeIn var(--duration-normal) var(--ease-out);
}

/* ========================================
   Modal & Dialog
   ======================================== */

.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(10px);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

.modal.show {
    display: flex;
}

.modal-content {
    background: var(--md-bg-primary);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-2xl);
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-2xl);
}

.modal-header {
    margin-bottom: var(--spacing-lg);
}

.modal-title {
    font-size: var(--text-title-2);
    font-weight: var(--font-semibold);
    margin: 0;
}

.modal-body {
    margin-bottom: var(--spacing-lg);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-md);
}

/* ========================================
   Responsive Utilities
   ======================================== */

/* グローバル入力欄のはみ出し防止 */
input,
textarea,
select,
.form-control {
    max-width: 100%;
    box-sizing: border-box;
}

@media (max-width: 768px) {
    .hide-mobile { display: none !important; }

    html {
        overflow-x: hidden;
    }

    body {
        overflow-x: hidden;
        width: 100%;
    }

    .container {
        padding: 0 var(--spacing-md);
        max-width: 100%;
        overflow-x: hidden;
    }

    /* ヘッダーのスマホ対応（重なり防止） */
    .header {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: left;
        padding: var(--spacing-md) !important;
    }

    .header h1 {
        font-size: 18px !important;
        line-height: 1.4 !important;
        word-break: break-word;
        margin: 0 !important;
    }

    .header .nav-links,
    .header .header-actions {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
        width: 100%;
        justify-content: flex-start;
    }

    .header .nav-links a,
    .header .back-btn {
        padding: 8px 14px !important;
        font-size: 13px !important;
        white-space: nowrap;
    }

    .table {
        font-size: var(--text-subhead);
        display: block;
        overflow-x: auto;
    }

    .btn {
        width: 100%;
    }

    /* 入力欄のスマホ対応 */
    input[type="text"],
    input[type="email"],
    input[type="password"],
    input[type="number"],
    input[type="date"],
    input[type="time"],
    input[type="datetime-local"],
    textarea,
    select,
    .form-control {
        width: 100% !important;
        max-width: 100% !important;
        min-width: 0 !important;
        font-size: 16px !important; /* iOS zoom防止 */
        box-sizing: border-box !important;
    }

    /* フォームグループ */
    .form-group {
        width: 100%;
        max-width: 100%;
    }

    /* フレックスの折り返し */
    .selection-area,
    .form-row,
    .input-row {
        flex-direction: column !important;
        gap: 15px;
    }

    /* テーブル内の入力欄 */
    td input,
    td textarea,
    td select {
        width: 100% !important;
        min-width: 0 !important;
    }
}

@media (min-width: 769px) {
    .hide-desktop { display: none !important; }
}

/* ========================================
   Table Scroll Support (モバイル対応)
   ======================================== */

.table-responsive,
.table-wrapper {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin-bottom: var(--spacing-md);
}

.table-responsive > table,
.table-wrapper > table {
    min-width: 600px;
    width: 100%;
}

/* 横スクロール可能なテーブル用のヒント */
@media (max-width: 768px) {
    .table-responsive,
    .table-wrapper {
        position: relative;
        border: 1px solid var(--md-gray-5);
        border-radius: var(--radius-sm);
    }

    .table-responsive > table,
    .table-wrapper > table {
        min-width: 700px;
    }

    /* スクロールヒント（影） */
    .table-responsive::after,
    .table-wrapper::after {
        content: '';
        position: absolute;
        top: 0;
        right: 0;
        bottom: 0;
        width: 20px;
        background: linear-gradient(to left, rgba(0,0,0,0.08), transparent);
        pointer-events: none;
        opacity: 1;
        transition: opacity 0.3s;
    }

    /* スクロール済みの場合は影を非表示 */
    .table-responsive.scrolled-right::after,
    .table-wrapper.scrolled-right::after {
        opacity: 0;
    }
}

/* ========================================
   Utility Classes
   ======================================== */

.text-left { text-align: left; }
.text-center { text-align: center; }
.text-right { text-align: right; }

.w-full { width: 100%; }
.h-full { height: 100%; }

.d-none { display: none; }
.d-block { display: block; }
.d-inline { display: inline; }
.d-inline-block { display: inline-block; }
.d-flex { display: flex; }

.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }

.cursor-pointer { cursor: pointer; }

.opacity-50 { opacity: 0.5; }
.opacity-75 { opacity: 0.75; }

/* ========================================
   Print Styles
   ======================================== */

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

    .header,
    .navbar {
        box-shadow: none;
    }

    .card {
        break-inside: avoid;
    }
}