@font-face {
    font-family: "Vazirmatn";
    src: url("fonts/Vazirmatn-Regular.woff2") format("woff2");
    font-style: normal;
    font-weight: 400;
    font-display: swap;
}

:root {
    --bs-font-sans-serif: "Vazirmatn", sans-serif;
    --bs-body-font-family: "Vazirmatn", sans-serif;
    --bg: #f3f4f6;
    --surface: #ffffff;
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --accent: #8b5cf6;
    --success: #14b8a6;
    --highlight: #f59e0b;
    --text: #0d1b2a;
    --muted: #6b7280;
    --border: #e5e7eb;
}

* {
    box-sizing: border-box;
}

body {
    font-family: "Vazirmatn", sans-serif;
    margin: 0;
    background: linear-gradient(135deg, #f8fbff 0%, var(--bg) 100%);
    color: var(--text);
    line-height: 1.6;
}

.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(16px);
}

.brand-logo {
    width: clamp(180px, 24vw, 280px);
    height: auto;
    max-height: 60px;
    object-fit: contain;
}

.main-nav {
    flex-grow: 0;
    margin-left: auto;
}

.main-nav-list {
    gap: 0.25rem;
}

@media (min-width: 992px) {
    .navbar-brand {
        order: 1;
        margin-right: 0.75rem;
    }

    .main-nav {
        order: 3;
        margin-left: auto;
        margin-right: 0;
    }
}

@media (max-width: 991.98px) {
    .brand-logo {
        width: 200px;
    }

    .main-nav {
        width: 100%;
        margin-left: 0;
    }

    .main-nav-list {
        padding-top: 0.75rem;
    }
}

.hero-card {
    background: linear-gradient(135deg, #ffffff 0%, #eef4ff 100%);
    border: 1px solid var(--border);
}

.hero-panel {
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.12), rgba(139, 92, 246, 0.12));
    border: 1px solid rgba(37, 99, 235, 0.16);
}

.hero-bullet {
    color: var(--primary);
    font-weight: 700;
}

.feature-card,
.tool-card {
    background: var(--surface);
    border: 1px solid var(--border);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.feature-card:hover,
.tool-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 30px rgba(15, 23, 42, 0.09);
}

.home-tool-label {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.35rem 0.7rem;
    border-radius: 999px;
    background: rgba(37, 99, 235, 0.1);
    color: var(--primary);
    font-size: 0.78rem;
    font-weight: 700;
    white-space: nowrap;
}

.tool-card-description {
    display: block;
    min-height: 0;
    line-height: 1.7;
}

.tool-description {
    white-space: pre-line;
    line-height: 1.9;
}

.calculator-shell {
    max-width: 880px;
}

.calculator-card {
    background: linear-gradient(135deg, #ffffff 0%, #eef4ff 100%);
    border: 1px solid var(--border);
}

.calculator-intro {
    max-width: 520px;
}

.calculator-display-wrap {
    padding: 1rem;
    border-radius: 24px;
    background: rgba(37, 99, 235, 0.06);
    border: 1px solid rgba(37, 99, 235, 0.1);
}

.calculator-hint {
    color: var(--muted);
    font-size: 0.95rem;
}

.calculator-hint span {
    color: var(--text);
    font-weight: 600;
}

.calculator-display {
    width: 100%;
    min-height: 80px;
    border: none;
    background: transparent;
    text-align: right;
    font-size: clamp(1.75rem, 4vw, 2.7rem);
    font-weight: 700;
    color: var(--text);
    padding: 0;
    box-shadow: none;
}

.calculator-display:focus {
    box-shadow: none;
}

.calculator-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0.85rem;
}

.calculator-btn {
    min-height: 62px;
    border-radius: 18px;
    border: 1px solid var(--border);
    background: #fff;
    color: var(--text);
    font-weight: 700;
    font-size: 1rem;
}

.calculator-btn:hover {
    background: #f8fbff;
    border-color: rgba(37, 99, 235, 0.24);
}

.calculator-btn-soft {
    background: rgba(37, 99, 235, 0.08);
    color: var(--primary);
}

.calculator-btn-op {
    background: rgba(139, 92, 246, 0.12);
    color: #6d28d9;
}

.calculator-btn-equals {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}

.calculator-btn-equals:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    color: #fff;
}

.calculator-btn-zero {
    grid-column: span 4;
}

@media (max-width: 575.98px) {
    .calculator-grid {
        gap: 0.65rem;
    }

    .calculator-btn {
        min-height: 56px;
        font-size: 0.95rem;
    }
}

.image-converter-shell {
    max-width: 920px;
}

.image-converter-card {
    background: linear-gradient(135deg, #ffffff 0%, #eef4ff 100%);
    border: 1px solid var(--border);
}

.image-converter-intro {
    max-width: 640px;
}

.image-converter-form .form-control,
.image-converter-form .form-select {
    min-height: 52px;
    border-radius: 14px;
}

.image-format-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.image-format-chip {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 72px;
    padding: 0.55rem 0.9rem;
    border-radius: 999px;
    border: 1px solid rgba(37, 99, 235, 0.16);
    background: rgba(37, 99, 235, 0.08);
    color: var(--primary);
    font-weight: 700;
}

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

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

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

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

.footer {
    background: #f8fafc;
    border-top: 1px solid var(--border);
}

textarea,
input:not([type="checkbox"]):not([type="radio"]):not([type="range"]) {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: 12px;
    font-size: 14px;
    background: #fff;
    color: var(--text);
}

textarea:focus,
input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

textarea {
    min-height: 220px;
    resize: vertical;
}

.badge {
    background: rgba(37, 99, 235, 0.1);
    color: var(--primary);
}

.image-drop-zone {
    border-color: var(--border);
    cursor: pointer;
    transition: all 0.2s ease;
    background: rgba(37, 99, 235, 0.04);
}

.image-drop-zone:hover {
    border-color: var(--primary);
    background: rgba(37, 99, 235, 0.08);
}

.image-drop-zone-hover {
    border-color: var(--primary) !important;
    background: rgba(37, 99, 235, 0.12) !important;
}

.image-drop-zone-active {
    border-color: var(--success) !important;
    background: rgba(20, 184, 166, 0.08) !important;
}

.image-file-input {
    display: none !important;
}

/* Shared responsive layout: allow content to wrap rather than clip. */
main .card, main .card-body, main .row > *, main .d-flex > * { min-width: 0; }
main h1, main h2, main h3, main p, main label, .footer { overflow-wrap: anywhere; }
main img { max-width: 100%; }
textarea, .form-control, .form-select { max-width: 100%; }
.tool-card > .d-flex { flex-wrap: wrap; }
.image-output-formats { display: grid; grid-template-columns: repeat(auto-fit, minmax(72px, 1fr)); gap: 8px; width: 100%; }
.image-output-formats .format-btn { min-height: 44px; margin: 0; padding-inline: 8px; }
#imageInfo, #resultInfo, #lastKey { overflow-wrap: anywhere; }
@media (max-width: 991.98px) {
    .btn, .form-select, .form-control { min-height: 44px; }
    .btn { white-space: normal; }
    .navbar-toggler { min-width: 44px; min-height: 44px; }
    .form-control, .form-select, textarea, input:not([type="checkbox"]):not([type="radio"]):not([type="range"]) { font-size: 16px; }
}
@media (max-width: 575.98px) {
    .brand-logo { width: clamp(140px, 50vw, 200px); }
    .navbar-brand { max-width: calc(100% - 70px); margin-right: 8px; }
    main .card-body.p-4, main .card.p-4, main .hero-card.p-4,
    main .feature-card.p-4, main .tool-card.p-4, main .hero-panel.p-4 { padding: 1rem !important; }
    .hero-card .btn-lg { width: 100%; }
    .image-upload-actions { gap: 8px !important; }
    .image-upload-actions .btn { flex: 1 1 130px; padding-inline: 12px !important; }
    #convertBtn { width: 100%; padding-inline: 12px !important; }
    .calculator-grid { gap: 6px; }
    .calculator-display { font-size: clamp(1.75rem, 4vw, 2.7rem) !important; }
    .calculator-btn { border-radius: 12px; min-height: 48px; padding: 6px 2px; }
    .calculator-display-wrap { padding: 12px; }
    textarea { min-height: 180px; }
    #presets .btn { flex: 1 1 140px; }
}

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