/*
Theme Name: Visit Da Nang
Theme URI: https://example.com/visit-danang
Author: AI Developer
Author URI: https://example.com
Description: Giao diện du lịch Đà Nẵng tối ưu SEO và tốc độ, chuẩn thiết kế 100%.
Version: 1.0
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: visit-danang
*/

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
    --primary-blue: #1e5ba3;
    --secondary-blue: #5b9bd5;
    --light-blue-bg: #e6f0fa;
    --text-color: #333333;
    --text-gray: #666666;
    --text-light-gray: #999999;
    --border-color: #e5e5e5;
    --white: #ffffff;
    --bg-gray: #f8f9fa;
    --font-main: 'Inter', sans-serif;
    --container-width: 1200px;
}

/* ==========================================================================
   Reset & Base
   ========================================================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-main);
    color: var(--text-color);
    line-height: 1.6;
    background-color: var(--white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: var(--primary-blue);
    text-decoration: none;
    transition: all 0.3s ease;
}

a:hover {
    color: var(--secondary-blue);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 1rem;
    color: var(--primary-blue);
}

ul, ol {
    list-style: none;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 15px;
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
    display: inline-block;
    padding: 10px 24px;
    border-radius: 30px;
    font-weight: 500;
    text-align: center;
    cursor: pointer;
    border: none;
    transition: all 0.3s;
}

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

.btn-primary:hover {
    background-color: var(--secondary-blue);
    color: var(--white);
}

.btn-outline {
    border: 1px solid var(--border-color);
    background-color: transparent;
    color: var(--text-color);
}

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

/* ==========================================================================
   Utilities
   ========================================================================== */
.text-center { text-align: center; }
.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mt-3 { margin-top: 3rem; }
.mt-4 { margin-top: 4rem; }
.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }
.mb-3 { margin-bottom: 3rem; }
.mb-4 { margin-bottom: 4rem; }
.pt-4 { padding-top: 4rem; }
.pb-4 { padding-bottom: 4rem; }

/* Grid System basic */
.row {
    display: flex;
    flex-wrap: wrap;
    margin-left: -15px;
    margin-right: -15px;
}

.col {
    padding-left: 15px;
    padding-right: 15px;
}

.col-3 { width: 25%; }
.col-4 { width: 33.333%; }
.col-6 { width: 50%; }
.col-8 { width: 66.666%; }
.col-12 { width: 100%; }

@media (max-width: 768px) {
    .col-3, .col-4, .col-6, .col-8 { width: 100%; }
}