/* ========== iOS Perplexity 完整风格 ========== */

:root {
    /* Perplexity 配色 */
    --perplexity-primary: #6366f1;
    --perplexity-bg: #ffffff;
    --perplexity-surface: #f9fafb;
    --perplexity-border: #e5e7eb;
    --perplexity-text: #111827;
    --perplexity-text-sub: #6b7280;
    
    /* 暗色模式 */
    --dark-bg: #0f1419;
    --dark-surface: #1a1f2e;
    --dark-border: #2a3142;
    --dark-text: #e5e7eb;
}

/* 暗色模式 */
[data-theme="dark"] {
    --perplexity-primary: #818cf8;
    --perplexity-bg: var(--dark-bg);
    --perplexity-surface: var(--dark-surface);
    --perplexity-border: var(--dark-border);
    --perplexity-text: var(--dark-text);
}

/* ========== 胶囊按钮 ========== */
.btn, button.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 20px;
    background: var(--perplexity-surface);
    color: var(--perplexity-text);
    border: 1.5px solid var(--perplexity-border);
    border-radius: 24px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

.btn:hover {
    background: var(--perplexity-primary);
    color: white;
    border-color: var(--perplexity-primary);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.btn:active {
    transform: translateY(0);
}

/* 主要按钮 */
.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #764ba2 0%, #667eea 100%);
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.4);
}

/* 图标按钮 */
.btn-icon {
    width: 40px;
    height: 40px;
    padding: 0;
    border-radius: 50%;
    background: var(--perplexity-surface);
    border: 1.5px solid var(--perplexity-border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-icon:hover {
    background: var(--perplexity-primary);
    color: white;
    border-color: var(--perplexity-primary);
    transform: scale(1.1);
}

/* ========== 弹窗美化 ========== */
.modal-bg {
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.modal {
    background: var(--perplexity-bg);
    border-radius: 24px;
    box-shadow: 
        0 20px 25px -5px rgba(0, 0, 0, 0.1),
        0 10px 10px -5px rgba(0, 0, 0, 0.04);
    border: 1.5px solid var(--perplexity-border);
    overflow: hidden;
}

.modal-header {
    padding: 20px 24px;
    background: var(--perplexity-surface);
    border-bottom: 1.5px solid var(--perplexity-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--perplexity-text);
}

.modal-close {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--perplexity-surface);
    border: 1.5px solid var(--perplexity-border);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1.2rem;
    transition: all 0.2s ease;
}

.modal-close:hover {
    background: #ef4444;
    color: white;
    border-color: #ef4444;
    transform: scale(1.1);
}

/* ========== 表单美化 ========== */
.form-input, input.form-input, textarea.form-input, select.form-input {
    padding: 12px 16px;
    background: var(--perplexity-surface);
    border: 1.5px solid var(--perplexity-border);
    border-radius: 16px;
    font-size: 0.95rem;
    color: var(--perplexity-text);
    transition: all 0.2s ease;
}

.form-input:focus {
    outline: none;
    border-color: var(--perplexity-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

/* ========== 悬浮按钮 ========== */
.fab {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    box-shadow: 0 4px 14px 0 rgba(102, 126, 234, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: none;
}

.fab:hover {
    transform: scale(1.1) rotate(5deg);
    box-shadow: 0 8px 24px 0 rgba(102, 126, 234, 0.6);
}

.fab:active {
    transform: scale(0.95);
}

.fab.secondary {
    background: linear-gradient(135deg, #f59e0b 0%, #f97316 100%);
    box-shadow: 0 4px 14px 0 rgba(245, 158, 11, 0.4);
}

.fab.secondary:hover {
    box-shadow: 0 8px 24px 0 rgba(245, 158, 11, 0.6);
}

/* ========== 卡片美化 ========== */
.link-card, .note-card {
    background: var(--perplexity-bg);
    border: 1.5px solid var(--perplexity-border);
    border-radius: 16px;
    transition: all 0.2s ease;
}

.link-card:hover, .note-card:hover {
    border-color: var(--perplexity-primary);
    box-shadow: 0 8px 20px rgba(99, 102, 241, 0.15);
}

/* ========== 标签美化 ========== */
.tag, .note-tag {
    padding: 6px 14px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 14px;
    font-size: 0.8rem;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.tag:hover, .note-tag:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}