/* 全局樣式重置 - 現代化設計 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* CSS 變量定義 - 基於 Uiverse.io 調色板 */
:root {
    /* 主色調 */
    --primary-color: #667eea;
    --primary-dark: #764ba2;
    --primary-light: #a8b5ff;
    --primary-rgb: 102, 126, 234;
    
    /* 輔助色調 */
    --secondary-color: #6c757d;
    --secondary-dark: #4b5563;
    --secondary-light: #9ca3af;
    
    /* 狀態色調 */
    --success-color: #10b981;
    --success-dark: #059669;
    --danger-color: #ef4444;
    --danger-dark: #dc2626;
    --warning-color: #f59e0b;
    --warning-dark: #d97706;
    --info-color: #3b82f6;
    --info-dark: #2563eb;
    
    /* 中性色調 */
    --white: #ffffff;
    --black: #000000;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    /* 漸變色 */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-success: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --gradient-warning: linear-gradient(135deg, #ffecd2 0%, #fcb69f 100%);
    --gradient-danger: linear-gradient(135deg, #ff9a9e 0%, #fecfef 100%);
    
    /* 陰影 */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    /* 圓角 */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-2xl: 24px;
    --radius-full: 9999px;
    
    /* 間距 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* 字體大小 */
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    
    /* 過渡動畫 */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* 文字顏色 */
    --text-color: #1f2937;
    --text-muted: #4b5563;
    --text-light: #6b7280;
    --text-white: #ffffff;
    --text-dark: #111827;
    
    /* 背景色 */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-dark: #1f2937;
    --bg-light: #f9fafb;
    
    /* 邊框色 */
    --border-color: #e5e7eb;
    --border-dark: #374151;
}

/* 基礎樣式 */
html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', 'Segoe UI', 'Roboto', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 容器樣式 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

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

/* 標題樣式 */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    color: var(--text-color);
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }

/* 按鈕樣式 - 現代化設計 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 1.75rem;
    margin: 0.25rem;
    border: none;
    border-radius: 16px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    text-decoration: none;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-weight: 600;
    font-size: 1rem;
    line-height: 1.5;
    position: relative;
    overflow: hidden;
    box-shadow: 
        0 4px 14px 0 rgba(102, 126, 234, 0.4),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s ease;
}

.btn:hover::before {
    left: 100%;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 
        0 8px 25px 0 rgba(102, 126, 234, 0.5),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.btn:active {
    transform: translateY(-1px);
    transition: transform 0.1s ease;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--white);
    box-shadow: var(--shadow-medium);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-heavy);
}

.btn-secondary {
    background: var(--gradient-secondary);
    color: var(--white);
    box-shadow: var(--shadow-medium);
}

.btn-secondary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-heavy);
}

.btn-success {
    background: linear-gradient(135deg, var(--success-color) 0%, #3db86a 100%);
    box-shadow: 
        0 4px 14px 0 rgba(72, 219, 251, 0.4),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.btn-success:hover {
    box-shadow: 
        0 8px 25px 0 rgba(72, 219, 251, 0.5),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.btn-warning {
    background: linear-gradient(135deg, var(--warning-color) 0%, #e6b347 100%);
    color: var(--black);
    box-shadow: 
        0 4px 14px 0 rgba(254, 202, 87, 0.4),
        inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

.btn-warning:hover {
    box-shadow: 
        0 8px 25px 0 rgba(254, 202, 87, 0.5),
        inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

.btn-outline {
    background: rgba(255, 107, 107, 0.1);
    color: var(--primary-color);
    border: 2px solid rgba(255, 107, 107, 0.3);
    backdrop-filter: blur(10px);
    box-shadow: none;
}

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

.btn-large {
    padding: 1.125rem 2.25rem;
    font-size: var(--font-size-lg);
    border-radius: 20px;
    min-height: 56px;
}

.btn-small {
    padding: 0.625rem 1.25rem;
    font-size: var(--font-size-sm);
    border-radius: 12px;
    min-height: 36px;
}

/* 按鈕組 */
.btn-group {
    display: inline-flex;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.1);
}

.btn-group .btn {
    border-radius: 0;
    margin: 0;
    border-right: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-group .btn:first-child {
    border-top-left-radius: 16px;
    border-bottom-left-radius: 16px;
}

.btn-group .btn:last-child {
    border-top-right-radius: 16px;
    border-bottom-right-radius: 16px;
    border-right: none;
}

/* 輸入框樣式 - 現代化設計 */
.input-group {
    position: relative;
    margin-bottom: 1.5rem;
}

.form-control, input[type="text"], input[type="email"], input[type="password"], 
input[type="number"], input[type="tel"], input[type="url"], textarea, select {
    width: 100%;
    padding: 1rem 1.25rem;
    border: 2px solid #e5e7eb;
    border-radius: 16px;
    font-size: 1rem;
    font-family: inherit;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.06);
    outline: none;
}

.form-control:focus, input:focus, textarea:focus, select:focus {
    border-color: var(--primary-color);
    box-shadow: 
        0 0 0 4px rgba(102, 126, 234, 0.1),
        inset 0 2px 4px rgba(0,0,0,0.06);
    background: white;
    transform: translateY(-1px);
}

.form-control::placeholder, input::placeholder, textarea::placeholder {
    color: #9ca3af;
    font-weight: 400;
}

/* 浮動標籤效果 */
.floating-label {
    position: relative;
}

.floating-label input {
    padding-top: 1.5rem;
    padding-bottom: 0.5rem;
}

.floating-label label {
    position: absolute;
    top: 1rem;
    left: 1.25rem;
    color: #9ca3af;
    font-size: 1rem;
    transition: all 0.3s ease;
    pointer-events: none;
    background: white;
    padding: 0 0.25rem;
}

.floating-label input:focus + label,
.floating-label input:not(:placeholder-shown) + label {
    top: -0.5rem;
    left: 1rem;
    font-size: 0.75rem;
    color: var(--primary-color);
    font-weight: 600;
}

/* 輸入組合樣式 */
.input-group {
    display: flex;
    align-items: stretch;
    position: relative;
}

.input-group .form-control {
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
    border-right: none;
    margin-bottom: 0;
}

.input-group .btn {
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
    border-left: 2px solid var(--primary-color);
}

/* 表單標籤 */
.form-label, label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: #374151;
    font-size: 0.95rem;
}

/* 表單組 */
.form-group {
    margin-bottom: 1.5rem;
}

/* 複選框和單選框 */
.form-check {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.form-check-input {
    width: 1.25rem;
    height: 1.25rem;
    border: 2px solid #d1d5db;
    border-radius: 0.375rem;
    background: white;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
}

.form-check-input[type="radio"] {
    border-radius: 50%;
}

.form-check-input:checked {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    border-color: var(--primary-color);
}

.form-check-input:checked::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 0.75rem;
    font-weight: bold;
}

.form-check-input[type="radio"]:checked::after {
    content: '';
    width: 0.5rem;
    height: 0.5rem;
    background: white;
    border-radius: 50%;
}

.form-check-label {
    color: #374151;
    font-weight: 500;
    cursor: pointer;
    user-select: none;
}

/* 選擇框樣式 */
select.form-control {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
    background-position: right 0.75rem center;
    background-repeat: no-repeat;
    background-size: 1.5rem 1.5rem;
    padding-right: 3rem;
    appearance: none;
}

/* 文本區域 */
textarea.form-control {
    min-height: 120px;
    resize: vertical;
    line-height: 1.6;
}

/* 輸入驗證狀態 */
.form-control.is-valid, input.is-valid {
    border-color: var(--success-color);
    box-shadow: 0 0 0 4px rgba(34, 197, 94, 0.1);
}

.form-control.is-invalid, input.is-invalid {
    border-color: var(--danger-color);
    box-shadow: 0 0 0 4px rgba(239, 68, 68, 0.1);
}

.valid-feedback {
    color: var(--success-color);
    font-size: 0.875rem;
    margin-top: 0.25rem;
    font-weight: 500;
}

.invalid-feedback {
    color: var(--danger-color);
    font-size: 0.875rem;
    margin-top: 0.25rem;
    font-weight: 500;
}

/* 輸入框圖標 */
.input-icon {
    position: relative;
}

.input-icon input {
    padding-left: 3rem;
}

.input-icon .icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: #9ca3af;
    font-size: 1.25rem;
    pointer-events: none;
}

.input-icon input:focus + .icon {
    color: var(--primary-color);
}

/* 卡片樣式 */
.card {
    background: var(--white);
    border-radius: var(--radius-large);
    box-shadow: var(--shadow-medium);
    overflow: hidden;
    transition: all var(--transition-normal);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-heavy);
}

.card-header {
    padding: var(--spacing-md);
    background: var(--gradient-primary);
    color: var(--white);
}

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

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

/* 網格系統 */
.grid {
    display: grid;
    gap: var(--spacing-md);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* 彈性布局 */
.flex {
    display: flex;
}

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

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

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

.flex-wrap {
    flex-wrap: wrap;
}

.flex-1 {
    flex: 1;
}

/* 間距工具類 */
.m-0 { margin: 0; }
.m-1 { margin: var(--spacing-xs); }
.m-2 { margin: var(--spacing-sm); }
.m-3 { margin: var(--spacing-md); }
.m-4 { margin: var(--spacing-lg); }

.p-0 { padding: 0; }
.p-1 { padding: var(--spacing-xs); }
.p-2 { padding: var(--spacing-sm); }
.p-3 { padding: var(--spacing-md); }
.p-4 { padding: var(--spacing-lg); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }

/* 文字工具類 */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-primary { color: var(--primary-color); }
.text-secondary { color: var(--secondary-color); }
.text-white { color: var(--white); }
.text-dark { color: var(--dark-bg); }
.text-muted { color: var(--gray-medium); }

.font-weight-normal { font-weight: 400; }
.font-weight-bold { font-weight: 700; }

/* 顯示工具類 */
.d-none { display: none; }
.d-block { display: block; }
.d-inline { display: inline; }
.d-inline-block { display: inline-block; }
.d-flex { display: flex; }

/* 位置工具類 */
.position-relative { position: relative; }
.position-absolute { position: absolute; }
.position-fixed { position: fixed; }

/* 響應式工具類 */
@media (max-width: 768px) {
    .d-md-none { display: none; }
    .d-md-block { display: block; }
    .grid-2 { grid-template-columns: 1fr; }
    .grid-3 { grid-template-columns: 1fr; }
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
    .d-sm-none { display: none; }
    .d-sm-block { display: block; }
    .grid-4 { grid-template-columns: 1fr; }
}

/* 動畫類 */
.fade-in {
    animation: fadeIn var(--transition-slow) ease-in;
}

.slide-up {
    animation: slideUp var(--transition-slow) ease-out;
}

.bounce-in {
    animation: bounceIn 0.6s ease-out;
}

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

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes bounceIn {
    0% {
        opacity: 0;
        transform: scale(0.3);
    }
    50% {
        opacity: 1;
        transform: scale(1.05);
    }
    70% {
        transform: scale(0.9);
    }
    100% {
        opacity: 1;
        transform: scale(1);
    }
}

/* 載入動畫 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255,255,255,.3);
    border-radius: 50%;
    border-top-color: var(--white);
    animation: spin 1s ease-in-out infinite;
}

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

/* 新增動畫效果 */
@keyframes fadeOut {
    from { opacity: 1; }
    to { opacity: 0; }
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideOutRight {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(100%);
        opacity: 0;
    }
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

@keyframes bounce {
    0%, 20%, 53%, 80%, 100% {
        transform: translate3d(0, 0, 0);
    }
    40%, 43% {
        transform: translate3d(0, -30px, 0);
    }
    70% {
        transform: translate3d(0, -15px, 0);
    }
    90% {
        transform: translate3d(0, -4px, 0);
    }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-10px); }
    20%, 40%, 60%, 80% { transform: translateX(10px); }
}

/* 通知樣式 */
.alert {
    padding: var(--spacing-md);
    border-radius: var(--radius-medium);
    margin-bottom: var(--spacing-md);
    border-left: 4px solid;
}

.alert-success {
    background-color: #d4edda;
    border-color: var(--success-color);
    color: #155724;
}

.alert-warning {
    background-color: #fff3cd;
    border-color: var(--warning-color);
    color: #856404;
}

.alert-danger {
    background-color: #f8d7da;
    border-color: var(--primary-color);
    color: #721c24;
}

/* 模態框樣式 */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--white);
    border-radius: var(--radius-large);
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    transform: scale(0.7);
    transition: transform var(--transition-normal);
}

.modal-overlay.active .modal {
    transform: scale(1);
}

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

.modal-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin: 0;
}

.modal-close {
    background: none;
    border: none;
    font-size: var(--font-size-xl);
    cursor: pointer;
    color: var(--gray-medium);
    transition: color var(--transition-fast);
}

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

.modal-body {
    padding: var(--spacing-md);
}

.modal-footer {
    padding: var(--spacing-md);
    border-top: 1px solid var(--gray-light);
    display: flex;
    gap: var(--spacing-sm);
    justify-content: flex-end;
}

/* 滾動條樣式 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--light-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--gray-medium);
    border-radius: var(--radius-small);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gray-dark);
}