/* CSS cho trang thêm khách hàng */

/* Reset và cài đặt chung */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f5f5f5;
    color: #333;
}

/* Khung chứa chính */
.khung-chinh {
    max-width: 1000px;
    margin: 20px auto;
    padding: 25px;
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 3px 12px rgba(0, 0, 0, 0.1);
}

/* Tiêu đề */
.tieu-de {
    border-bottom: 2px solid #3498db;
    padding-bottom: 15px;
    margin-bottom: 25px;
}

.tieu-de h2 {
    color: #2c3e50;
    font-size: 35px;
    font-weight: bold;
}

/* Form container */
.form-container {
    padding: 10px;
}

/* Thông báo lỗi */
.error-message {
    background-color: #ffecec;
    color: #e74c3c;
    padding: 15px;
    border-radius: 5px;
    margin-bottom: 20px;
    border-left: 5px solid #e74c3c;
    font-size: 14px;
}

.error-message ul {
    margin: 0;
    padding-left: 20px;
}

/* Nhóm form */
.form-group {
    margin-bottom: 20px;
    position: relative;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #2c3e50;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 15px;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: #3498db;
    box-shadow: 0 0 5px rgba(52, 152, 219, 0.3);
}

.form-group small {
    display: block;
    margin-top: 5px;
    color: #7f8c8d;
    font-size: 12px;
}

/* Nút bấm */
.form-buttons {
    display: flex;
    gap: 35px;
    margin-top: 30px;
}

.btn-submit,
.btn-reset,
.btn-back {
    padding: 12px 20px;
    border: none;
    border-radius: 5px;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.3s ease;
    text-decoration: none;
}

.btn-submit {
    background-color: #2ecc71;
    color: white;
}

.btn-submit:hover {
    background-color: #27ae60;
}

.btn-reset {
    background-color: #f39c12;
    color: white;
}

.btn-reset:hover {
    background-color: #e67e22;
}

.btn-back {
    background-color: #7f8c8d;
    color: white;
}

.btn-back:hover {
    background-color: #6c7a89;
}

/* Input file */
input[type="file"] {
    padding: 10px;
    background-color: #f8f9fa;
}



/* Hiệu ứng hover cho các input */
.form-group input:hover,
.form-group select:hover {
    border-color: #bdc3c7;
}

/* Định dạng cho placeholder */
::placeholder {
    color: #b2bec3;
    opacity: 1;
}

/* Tạo hiệu ứng chuyển tiếp mềm mại */
.form-group {
    transition: all 0.3s ease;
}

/* Hiệu ứng khi focus vào form group */
.form-group:focus-within {
    transform: translateY(-3px);
}

/* Định dạng cho select */
select {
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23a0aec0' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 15px center;
    background-size: 15px;
}

/* Thêm lớp focus cho các input */
.form-group input:focus,
.form-group select:focus {
    border-color: #3498db;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.25);
}

/* Thông báo thành công */
.success-message {
    background-color: #dff0d8;
    color: #3c763d;
    padding: 15px;
    margin-bottom: 20px;
    border: 1px solid #d6e9c6;
    border-radius: 4px;
    font-weight: bold;
    position: relative;
    transition: opacity 0.5s ease-out;
}

.error-message {
    background-color: #f2dede;
    color: #a94442;
    padding: 15px;
    margin-bottom: 20px;
    border: 1px solid #ebccd1;
    border-radius: 4px;
    transition: opacity 0.5s ease-out;
}

.hiding {
    opacity: 0;
}

/* ===== RESET ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

/* ===== BIẾN MÀU ===== */
:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --secondary: #f43f5e;
    --background: #f9fafb;
    --sidebar: #1e293b;
    --sidebar-hover: #334155;
    --text-light: #f8fafc;
    --text-dark: #1e293b;
    --border: #e2e8f0;
}

/* ===== LAYOUT CHUNG ===== */
body {
    display: flex;
    background-color: var(--background);
    color: var(--text-dark);
    min-height: 100vh;
}

/* ===== SIDEBAR ===== */
.thanh-ben {
    width: 250px;
    background-color: var(--sidebar);
    color: var(--text-light);
    padding: 20px 0;
    transition: all 0.3s ease;
    box-shadow: 2px 0 5px rgba(0, 0, 0, 0.1);
}

/* ===== THƯƠNG HIỆU ===== */
.thuong-hieu {
    padding: 0 20px 20px;
    margin-bottom: 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

.thuong-hieu h1 {
    font-size: 1.5rem;
    letter-spacing: 1px;
}

/* ===== MENU ===== */
.muc-menu {
    display: block;
    padding: 12px 20px;
    margin: 5px 0;
    border-left: 3px solid transparent;
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
}

.muc-menu:hover {
    background: var(--sidebar-hover);
    border-left-color: var(--secondary);
}

.muc-menu.hoat-dong {
    background: var(--sidebar-hover);
    border-left-color: var(--primary);
}

.muc-menu i {
    margin-right: 10px;
    width: 18px;
    text-align: center;
}

/* ===== MENU CON ===== */
.menu-con {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.menu-con.mo {
    max-height: 300px;
}

.muc-menu-con {
    padding: 10px 15px 10px 50px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s;
}

.muc-menu-con:hover {
    background-color: var(--sidebar-hover);
}

.muc-menu-con.hoat-dong {
    background: var(--sidebar-hover);
    border-left: 3px solid var(--primary);
    font-weight: 600;
}

/* ===== LINK ===== */
.a {
    text-decoration: none;
    color: inherit;
}

/* ===== ICON DROPDOWN ===== */
.bieu-tuong-dropdown {
    position: absolute;
    right: 20px;
    transition: transform 0.3s;
}

.bieu-tuong-dropdown.xoay {
    transform: rotate(180deg);
}

/* ===== NỘI DUNG CHÍNH ===== */
.noi-dung-chinh {
    flex: 1;
    padding: 20px;
}

/* ===== HEADER ===== */
.thanh-tren {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
}

.loi-chao {
    font-size: 1.5rem;
    font-weight: 600;
}

/* ===== USER INFO ===== */
.thong-tin-nguoi-dung {
    display: flex;
    align-items: center;
    background-color: white;
    padding: 10px 15px;
    border-radius: 50px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.anh-dai-dien {
    width: 35px;
    height: 35px;
    border-radius: 50%;
    background-color: var(--primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 10px;
    font-weight: bold;
}