/* =========================================
   CSS Variables
========================================= */

:root {
    --color-primary: #1f7a4d;
    --color-primary-dark: #155c39;
    --color-secondary: #2d9b63;

    --color-dark: #17251d;
    --color-text: #4b5a51;
    --color-muted: #718078;

    --color-white: #ffffff;
    --color-light: #f5f8f5;
    --color-border: #e2e9e4;

    --container-width: 1200px;

    --font-primary: "Noto Sans Bengali", "Hind Siliguri", sans-serif;

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;

    --shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.08);

    --transition: 0.3s ease;
}


/* =========================================
   CSS Reset
========================================= */

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

html {
    scroll-behavior: smooth;
}

body {
    min-height: 100vh;
    font-family: var(--font-primary);
    font-size: 16px;
    font-weight: 400;
    line-height: 1.7;
    color: var(--color-text);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

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

button,
input,
textarea,
select {
    font: inherit;
}

button {
    border: 0;
    cursor: pointer;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition);
}

ul,
ol {
    list-style: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    color: var(--color-dark);
    font-weight: 700;
    line-height: 1.3;
}

p {
    margin-bottom: 1rem;
}

p:last-child {
    margin-bottom: 0;
}


/* =========================================
   Selection
========================================= */

::selection {
    color: var(--color-white);
    background-color: var(--color-primary);
}


/* =========================================
   Container
========================================= */

.container {
    width: 100%;
    max-width: var(--container-width);
    margin-left: auto;
    margin-right: auto;
    padding-left: 20px;
    padding-right: 20px;
}


/* =========================================
   Section
========================================= */

.section {
    padding-top: 90px;
    padding-bottom: 90px;
}

.section--light {
    background-color: var(--color-light);
}

.section--white {
    background-color: var(--color-white);
}


/* =========================================
   Common Text Colors
========================================= */

.text-primary {
    color: var(--color-primary);
}

.text-dark {
    color: var(--color-dark);
}

.text-muted {
    color: var(--color-muted);
}

.text-white {
    color: var(--color-white);
}


/* =========================================
   Common Backgrounds
========================================= */

.bg-primary {
    background-color: var(--color-primary);
}

.bg-light {
    background-color: var(--color-light);
}

.bg-white {
    background-color: var(--color-white);
}

.bg-dark {
    background-color: var(--color-dark);
}


/* =========================================
   Buttons
========================================= */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 48px;
    padding: 10px 22px;
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-weight: 600;
    line-height: 1.4;
    white-space: nowrap;
    transition:
        background-color var(--transition),
        color var(--transition),
        border-color var(--transition),
        transform var(--transition),
        box-shadow var(--transition);
}

.btn:hover {
    transform: translateY(-2px);
}

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

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

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

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


/* =========================================
   Form Elements
========================================= */

.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    color: var(--color-dark);
    font-size: 15px;
    font-weight: 600;
}

.form-control {
    width: 100%;
    min-height: 48px;
    padding: 10px 14px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    outline: none;
    color: var(--color-dark);
    background-color: var(--color-white);
    transition:
        border-color var(--transition),
        box-shadow var(--transition);
}

.form-control:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(31, 122, 77, 0.1);
}

textarea.form-control {
    min-height: 140px;
    resize: vertical;
}


/* =========================================
   Grid Utilities
========================================= */

.grid {
    display: grid;
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 30px;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 30px;
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 24px;
}


/* =========================================
   Flex Utilities
========================================= */

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


/* =========================================
   Visibility Utilities
========================================= */

.hidden {
    display: none !important;
}

.visible {
    display: block !important;
}


/* =========================================
   Text Alignment
========================================= */

.text-left {
    text-align: left;
}

.text-center {
    text-align: center;
}

.text-right {
    text-align: right;
}


/* =========================================
   Border Radius
========================================= */

.radius-sm {
    border-radius: var(--radius-sm);
}

.radius-md {
    border-radius: var(--radius-md);
}

.radius-lg {
    border-radius: var(--radius-lg);
}

.radius-full {
    border-radius: 999px;
}


/* =========================================
   Shadows
========================================= */

.shadow-sm {
    box-shadow: var(--shadow-sm);
}

.shadow-md {
    box-shadow: var(--shadow-md);
}


/* =========================================
   Accessibility
========================================= */

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}


/* =========================================
   Focus
========================================= */

:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 3px;
}


/* =========================================
   Smooth Anchor Offset
========================================= */

[id] {
    scroll-margin-top: 90px;
}


/* =========================================
   Mobile Menu Body Lock
========================================= */

body.menu-open {
    overflow: hidden;
}