:root {
    --header-height: 0;
    /* Fluid typography scale */
    --font-step-0: clamp(1rem, 0.5vw + 0.875rem, 1.125rem);
    --font-step-1: clamp(1.25rem, 1vw + 1rem, 1.5rem);
    --font-step-2: clamp(1.5rem, 2vw + 1rem, 2.25rem);
    --font-step-3: clamp(2rem, 3vw + 1.5rem, 3rem);

    /* Fluid spacing scale */
    --space-1: clamp(0.25rem, 0.5vw, 0.5rem);
    --space-2: clamp(0.5rem, 1vw, 1rem);
    --space-3: clamp(0.75rem, 1.5vw, 1.5rem);
    --space-4: clamp(1rem, 2vw, 2rem);
    --space-5: clamp(1.5rem, 3vw, 3rem);
    --space-6: clamp(2rem, 4vw, 4rem);
    --space-7: clamp(3rem, 6vw, 6rem);
}

body{
    margin: 0;
    background-color: var(--bg);
    font-size: var(--font-step-0);
}


h1 {
    font-size: var(--font-step-3);
}

h2 {
    font-size: var(--font-step-2);
}

h3 {
    font-size: var(--font-step-1);
}

button,
input {
    font-size: var(--font-step-0);
    padding-block: var(--space-2);
    padding-inline: var(--space-3);
}

@media (max-width: 480px) {
    button:not(.sticky-hamburger):not(.theme-toggle),
    input,
    label {
        width: 100%;
    }
}

button:focus-visible,
input:focus-visible,
label:focus-visible {
    outline: 3px solid var(--btn-bg);
    outline-offset: var(--space-1);
}


#hero {
    background: url('images/main-hero-tehranplumber.ir-desktop-1536x1024.jpg') center/cover no-repeat;
    background-attachment: local;
}

@media (max-width: 768px) {
    #hero {
        background-image: url('images/main-hero-tehranplumber.ir-mobile-756x1134.webp');
    }
}



#services {
    background: var(--bg); /* Navy تیره هم‌رنگ هدر */
    padding: var(--space-7) var(--space-3);
    border-radius: 1.5rem;
    margin-top: var(--space-6);
    color: var(--text);
}

#services h2 {
    color: var(--text);
    text-align: center;
    margin-bottom: var(--space-7);
    font-size: var(--font-step-2);
}

/* section listing Tehran regions */
.tehranplumber-regions {
    margin-top: var(--space-6);
}

/* add margin to the regions section title */

.tehranplumber-regions h2 {
    margin-inline-end: var(--space-6);
    color: var(--text);
}

/* center the region grid like paragraphs */
.tehranplumber-regions .region-grid {
    max-width: 90vw;
    margin-inline-start: auto;
    margin-inline-end: auto;
    margin-bottom: calc(var(--space-7) * 2);
}

h2.districts-title {
    /* override generic .section h2 styles */
    font-size: var(--font-step-2);
    font-weight: 800;
    margin-bottom: var(--space-7);
    color: var(--text);
    text-align: center;
}

/* Mobile-first grid: one column by default */
.services-grid,
.region-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: clamp(1rem, 2vw, 2rem);
    grid-auto-flow: dense; /* سلول خالی نمی‌گذارد */
    direction: rtl;
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 14px;
    text-align: center;
    padding: var(--space-5) var(--space-3) var(--space-6);
    color: var(--text);
    box-shadow: 0 2px 6px rgb(0 0 0 / .08), 0 0 0 2px var(--card-ring);
    transition: .25s;
}

/* clickable cards for regions */
.region-card {
    display: block;
    text-decoration: none;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 6px 16px rgb(0 0 0 / .18);
}

.card i {
    font-size: var(--font-step-2);
    color: var(--text);
    margin-bottom: var(--space-3);
}

.card:hover i {
    color: #2563eb
}

.card .icon {
    width: 48px;
    height: 48px;
    margin: 0 auto var(--space-3);
    display: block;
    transition: .25s;
}

.card:hover .icon {
    filter: brightness(1.2);
}

.card h3 {
    font-size: var(--font-step-1);
    margin: 0 0 var(--space-2);
    font-weight: 700
}

.card p {
    font-size: var(--font-step-0);
    line-height: 1.98;
    margin: 0;
    color: var(--text-muted)
}


#hero .subtitle {
    font-size: clamp(1rem, 3vw, 1.4rem);
    margin: .6rem auto 1.2rem;
    font-weight: 500;
    width: fit-content;
    text-align: center;
}

.hero-benefits {
    list-style: none;
    padding: 0;
    margin: 0 auto var(--space-6);
    width: max-content;
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    font-size: var(--font-step-0);
}

@media (min-width: 992px) {
    #hero h1 {
        font-size: 3rem;
    }

    #hero .subtitle {
        font-size: 1.6rem;
    }

    .hero-benefits {
        font-size: 1.5rem;
    }
}


.hero-benefits li {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: var(--space-1);
    line-height: 1.2;
    text-align: right;
    overflow-wrap: anywhere;
}

.hero-benefits li::before {
    content: "\2714";
    position: static;
    color: var(--accent);
    font-weight: 800;
    font-size: var(--font-step-1);
}


#benefit-keywords {
    background: var(--bg);
    padding: var(--space-7) var(--space-3);
    border-radius: 1.5rem;
    margin-top: var(--space-6);
    color: var(--text);
}

#benefit-keywords h2 {
    color: var(--text);
    text-align: center;
    margin-bottom: var(--space-7);
    font-size: var(--font-step-2);
}

.benefit-grid {
    list-style: none;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: clamp(1rem, 2vw, 2rem);
    direction: rtl;
}


.benefit-grid li {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: var(--space-1);
    line-height: 1.8;
    text-align: right;
}

.benefit-grid li::before {
    content: "\2714";
    position: static;
    color: var(--accent);
    font-weight: 800;
    font-size: var(--font-step-1);
}


/* Pricing section */
.pricing {
    background: var(--bg);
    /* Use the same horizontal padding as other sections */
    padding: var(--space-7) var(--space-4);
    border-radius: 1.5rem;
    margin-top: var(--space-6);
    color: var(--text);
}

.pricing h2 {
    color: var(--text);
    text-align: center;
    margin-bottom: var(--space-4);
    font-size: var(--font-step-2);
}

.pricing p {
    /*max-width: 800px;*/
    margin: 0 auto var(--space-5);
    line-height: 2.2;
    font-size: var(--font-step-0);
}

.price-highlight {
    color: var(--accent);
    font-weight: 700;
}

.table-container {
    overflow-x: auto;
    min-inline-size: 100%;
}

@media (max-width: 300px) {
    .table-container {
        overflow-x: auto;
    }
}

.pricing-table {
    width: 100%;
    max-width: 700px;
    margin: var(--space-6) auto;
    border-collapse: collapse;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 14px;
    overflow: hidden;
    box-shadow: 0 2px 6px rgb(0 0 0 / .08), 0 0 0 2px var(--card-ring);
    font-size: var(--font-step-0);
}

.pricing-table th,
.pricing-table td {
    border: 1px solid var(--border);
    padding: var(--space-3) var(--space-4);
    text-align: center;
}

.pricing-table th {
    background: var(--primary);
    color: var(--btn-text);
    font-weight: 700;
}

.pricing-table tbody tr {
    cursor: pointer;
}

.pricing-table tbody tr:nth-child(even) {
    background: var(--bg);
}

.pricing-table tbody tr:hover {
    background: var(--accent);
    color: var(--text);
}

.faq-pricing {
    margin-top: var(--space-4);
    max-width: 80vw;
    margin-inline-start: auto;
    margin-inline-end: auto;
}

/* Why section */
#why {
    background: var(--bg);
    padding: var(--space-7) var(--space-3);
    border-radius: 1.5rem;
    margin-top: var(--space-6);
    color: var(--text);
}

#why h2 {
    color: var(--text);
    text-align: center;
    margin-bottom: var(--space-7);
    font-size: var(--font-step-2);
}

.why-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: clamp(1rem, 2vw, 2rem);
    direction: rtl;
}

.why-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 14px;
    text-align: center;
    padding: var(--space-5) var(--space-3);
    color: var(--text);
    box-shadow: 0 2px 6px rgb(0 0 0 / .08), 0 0 0 2px var(--card-ring);
}

.why-card p {
    margin: 0;
    font-weight: 700;
    font-size: var(--font-step-0);
}


.faq-pricing h3 {
    font-size: var(--font-step-1);
}

.faq-pricing h4 {
    font-size: var(--font-step-0);
}

/* Intro and FAQ sections */
#intro,
#faq {
    background: var(--bg);
    padding: var(--space-7) var(--space-3);
    border-radius: 1.5rem;
    margin-top: var(--space-6);
    color: var(--text);
}

.faq-content {
    max-width: 80vw;
    margin-inline-start: auto;
    margin-inline-end: auto;
    font-size: var(--font-step-0);
}

#intro h2,
#faq h2 {
    color: var(--text);
    text-align: center;
    margin-bottom: var(--space-4);
    font-size: var(--font-step-2);
}

@media (max-width: 768px) {
    .pricing {
        padding: var(--space-6) var(--space-3);
    }
}

/* region selection modal */
#region-modal {
    position: fixed;
    inset: 0;
    display: none;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, .6);
    z-index: 1000;
}

#region-modal.open {
    display: flex;
}

#region-modal .modal-card {
    background: var(--card-bg);
    padding-block: var(--space-6);
    padding-inline: clamp(1rem, 4vw, 2rem);
    border-radius: 1rem;
    width: 100%;
    max-inline-size: min(90%, 400px);
    position: relative;
    text-align: center;
}

#region-modal .modal-close {
    position: absolute;
    top: var(--space-2);
    inset-inline-start: var(--space-2);
    background: none;
    border: none;
    font-size: var(--font-step-2);
    color: var(--text);
    cursor: pointer;
}

#region-modal .modal-title {
    margin-bottom: var(--space-3);
    text-align: center;
}

#region-modal .modal-buttons {
    display: flex;
    gap: var(--space-4);
    margin-top: var(--space-5);
    flex-direction: column;
}

#region-modal .modal-buttons button {
    flex: 1;
}

@media (min-width: 480px) {
    #region-modal .modal-buttons {
        flex-direction: row;
    }
}

.btn-primary {
    font-family: 'TehranPlumber-font', 'Vazirmatn', sans-serif;
}

/* Animated CTA button */
.dynamite-btn {
    display: inline-block;
    margin-top: var(--space-5);
    position: relative;
    padding: var(--space-4) var(--space-5);
    font-size: var(--font-step-1);
    font-weight: bold;
    color: var(--btn-text);
    background-color: transparent;
    border: none;
    border-radius: 1000px;
    text-decoration: none;
    cursor: pointer;
    overflow: hidden;
    z-index: 0;
}

.dynamite-btn::before {
    content: "";
    position: absolute;
    top: -2px;
    inset-inline-start: -2px;
    inset-inline-end: -2px;
    bottom: -2px;
    background: conic-gradient(from 0deg, red, orange, yellow, red);
    border-radius: 1000px;
    z-index: -1;
    animation: spin-fuse 2s linear infinite;
    filter: blur(3px);
}

.dynamite-btn::after {
    content: "";
    position: absolute;
    top: 4px;
    inset-inline-start: 4px;
    inset-inline-end: 4px;
    bottom: 4px;
    background: var(--btn-bg);
    border-radius: 1000px;
    z-index: -1;
}

@keyframes spin-fuse {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

@media (max-width: 768px) {
    .hero-desktop-cta {
        display: block;
        margin: var(--space-6) auto 0;
        text-align: center;
    }

    /* Remove heavy animation on mobile and add a subtle press effect */
    .dynamite-btn {
        transition: transform 0.2s ease;
    }

    .dynamite-btn:active {
        transform: scale(0.97);
    }

.dynamite-btn::before {
        animation: none;
        filter: none;
        background: var(--btn-bg);
    }
}

@media (max-width: 300px) {
    .services-grid,
    .region-grid,
    .benefit-grid,
    .why-grid {
        grid-template-columns: 1fr;
    }

    .card {
        padding: var(--space-2);
    }

    .card h3 {
        font-size: 0.9rem;
        overflow-wrap: anywhere;
    }

    .card p {
        font-size: 0.8rem;
        overflow-wrap: anywhere;
    }

    .card i {
        font-size: 1.5rem;
    }
}