:root {
    --primary-color: #667eea;
    --primary-hover: #5a6fd8;
    --secondary-color: #764ba2;
    --success-color: #48bb78;
    --error-color: #f56565;
    --warning-color: #ed8936;
    --background-color: #f7fafc;
    --card-background: #ffffff;
    --text-color: #2d3748;
    --text-light: #718096;
    --border-color: #e2e8f0;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --shadow-hover: rgba(0, 0, 0, 0.15);
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

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

body {
    font-family: 'Noto Sans TC', sans-serif;
    background: var(--gradient-primary);
    min-height: 100vh;
    color: var(--text-color);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 2rem 1rem;
}

.container {
    max-width: 600px;
    width: 100%;
    background-color: var(--card-background);
    border-radius: 20px;
    padding: 2rem;
    box-shadow: 0 10px 20px var(--shadow-color);
    animation: slideUp 0.5s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

h1 {
    font-size: 2rem;
    color: var(--secondary-color);
    text-align: center;
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--secondary-color);
}

input[type="text"],
input[type="email"],
input[type="password"],
select {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background-color: #fff;
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"],
select:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1);
}

.checkbox-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.checkbox {
    width: 20px;
    height: 20px;
    border-radius: 5px;
    cursor: pointer;
}

button {
    width: 100%;
    padding: 1rem;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

button:hover {
    background-color: #357ABD;
    transform: translateY(-2px);
}

button:active {
    transform: translateY(0);
}

button:disabled {
    background-color: #95a5a6;
    cursor: not-allowed;
}

.loading {
    width: 20px;
    height: 20px;
    border: 3px solid #ffffff;
    border-top: 3px solid transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

#hiddenCanvas {
    display: none;
}

.form-header {
    text-align: center;
    margin-bottom: 2rem;
}

.form-description {
    text-align: center;
    color: #666;
    margin-bottom: 2rem;
}

.response-options {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.character-count {
    font-size: 0.875rem;
    color: #666;
    text-align: right;
    margin-top: 0.25rem;
}

.field-hint {
    font-size: 0.875rem;
    color: #666;
    margin-top: 0.25rem;
}

@media (max-width: 480px) {
    .container {
        padding: 1.5rem;
    }

    h1 {
        font-size: 1.75rem;
    }

    .response-options {
        grid-template-columns: 1fr;
    }
}

.question-item {
    border-bottom: 1px solid #ddd;
    padding: 10px 0;
}

.question-item p {
    margin: 5px 0;
}

.checkbox-group {
    display: flex;
    align-items: center;
}

.checkbox {
    margin-right: 10px;
}

.character-count {
    text-align: right;
    font-size: 12px;
    color: #666;
}

.field-hint {
    font-size: 12px;
    color: #888;
    margin-top: 5px;
}

a {
    text-decoration: none;
    color: var(--primary-color);
    display: flex;
    justify-content:center;
    margin-bottom: -1.5rem;
}

/* 導航欄樣式 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    box-shadow: 0 2px 10px var(--shadow-color);
}

.navbar-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 60px;
}

.navbar-brand a {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
    transition: all 0.3s ease;
    display: inline;
    margin: 0;
}

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

.navbar-menu {
    display: flex;
    align-items: center;
    gap: 20px;
}

.navbar-links {
    display: flex;
    gap: 15px;
}

.navbar-links a {
    color: var(--text-color);
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 20px;
    transition: all 0.3s ease;
    font-weight: 500;
    display: inline;
    margin: 0;
}

.navbar-links a:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

.user-menu {
    position: relative;
    display: inline-block;
}

.user-info {
    background: var(--gradient-primary);
    color: white;
    padding: 8px 16px;
    border-radius: 20px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.user-info:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px var(--shadow-hover);
}

.user-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    background: white;
    border-radius: 10px;
    box-shadow: 0 10px 30px var(--shadow-color);
    padding: 10px 0;
    min-width: 150px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    margin-top: 10px;
}

.user-menu:hover .user-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.user-dropdown a,
.user-dropdown button {
    display: block;
    width: 100%;
    padding: 10px 20px;
    color: var(--text-color);
    text-decoration: none;
    border: none;
    background: none;
    text-align: left;
    cursor: pointer;
    transition: background 0.3s ease;
    font-family: inherit;
    margin: 0;
}

.user-dropdown a:hover,
.user-dropdown button:hover {
    background: var(--background-color);
}

.logout-btn {
    color: var(--error-color) !important;
    font-weight: 500;
}

.auth-buttons {
    display: flex;
    gap: 10px;
}

.login-btn,
.signup-btn {
    padding: 8px 20px;
    border-radius: 20px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    display: inline;
    margin: 0;
}

.login-btn {
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.login-btn:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

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

.signup-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px var(--shadow-hover);
}

/* 美化問題項目 */
.question-item {
    background: var(--card-background);
    border-radius: 15px;
    padding: 1.5rem;
    margin-bottom: 1rem;
    box-shadow: 0 4px 15px var(--shadow-color);
    border-left: 4px solid var(--primary-color);
    transition: all 0.3s ease;
}

.question-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px var(--shadow-hover);
}

.question-item button {
    background: var(--gradient-secondary);
    width: auto;
    padding: 0.5rem 1.5rem;
    margin-top: 0.5rem;
    font-size: 0.9rem;
    border-radius: 25px;
}

.question-item button:hover {
    transform: translateY(-2px);
}

/* 美化表單 */
.form-header h1 {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.form-description {
    color: var(--text-light);
    font-size: 1.1rem;
    margin-bottom: 2rem;
}

/* 美化輸入框 */
input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
    transform: translateY(-1px);
}

/* 響應式設計 */
@media (max-width: 768px) {
    .navbar-container {
        padding: 0 15px;
    }
    
    .navbar-menu {
        gap: 10px;
    }
    
    .navbar-links {
        display: none;
    }
    
    .container {
        margin-top: 80px;
        padding: 1rem;
    }
    
    .user-dropdown {
        right: -10px;
    }
    
    .auth-buttons {
        flex-direction: column;
        gap: 5px;
    }
    
    .login-btn,
    .signup-btn {
        padding: 6px 12px;
        font-size: 0.9rem;
    }
}

/* 複製鏈接區塊樣式 */
.link-container {
    margin: 1rem 0;
}

.link-box {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 0.75rem 1rem;
    box-shadow: 0 2px 8px var(--shadow-color);
    transition: box-shadow 0.3s ease;
    margin-bottom: 1rem;
}

.link-box:hover {
    box-shadow: 0 4px 12px var(--shadow-hover);
}

.link-text {
    font-size: 0.9rem;
    color: var(--text-color);
    font-family: 'Courier New', Courier, monospace;
    /* word-break: break-all; */
    flex: 1;
}

.copy-btn {
    background: var(--gradient-primary);
    color: white;
    border: none;
    border-radius: 8px;
    padding: 0.5rem 0.75rem;
    font-size: 0.875rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    transition: all 0.3s ease;
}

.copy-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.copy-btn.copied {
    background: var(--success-color);
}

.btn-text {
    font-weight: 500;
}

.btn-icon {
    font-size: 1rem;
}

@media (max-width: 480px) {
    .link-box {
        flex-direction: column;
        align-items: flex-start;
    }

    .copy-btn {
        width: 100%;
        justify-content: center;
    }
}