/* Hesaplama Araçları — dedicated stylesheet (cache-busted) */
.calc-tools-area {
    background: linear-gradient(180deg, #eef4fb 0%, #f8fafc 40%, #fff 100%);
    position: relative;
    overflow: hidden;
}

.calc-tools-area::before {
    content: '';
    position: absolute;
    top: -120px;
    right: -80px;
    width: 320px;
    height: 320px;
    background: radial-gradient(circle, rgba(18, 115, 235, 0.08) 0%, transparent 70%);
    pointer-events: none;
}

.calc-hero {
    text-align: center;
    margin-bottom: 32px;
    position: relative;
    z-index: 1;
}

.calc-hero__badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: #fff;
    border: 1px solid #dce6f0;
    color: #1273eb;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    padding: 10px 18px;
    border-radius: 30px;
    margin-bottom: 16px;
    box-shadow: 0 4px 12px rgba(18, 115, 235, 0.1);
}

.calc-hero__lead {
    font-size: 1.05rem;
    color: #4a5d70;
    max-width: 720px;
    margin: 0 auto 24px;
    line-height: 1.7;
}

/* Hero nav — button cards */
.calc-hero__cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    max-width: 900px;
    margin: 0 auto;
}

.calc-hero__card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 96px;
    background: #fff;
    border: 2px solid #e3ecf5;
    border-radius: 14px;
    padding: 16px 12px;
    text-align: center;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease, background 0.2s ease;
    box-shadow: 0 2px 8px rgba(11, 31, 58, 0.06);
    -webkit-tap-highlight-color: transparent;
    user-select: none;
}

.calc-hero__card:hover {
    border-color: #1273eb;
    box-shadow: 0 8px 24px rgba(18, 115, 235, 0.15);
    transform: translateY(-3px);
}

.calc-hero__card.is-active {
    border-color: #1273eb;
    background: linear-gradient(135deg, #1273eb 0%, #0b1f3a 100%);
    box-shadow: 0 8px 28px rgba(18, 115, 235, 0.35);
    transform: translateY(-2px);
}

.calc-hero__card i {
    font-size: 1.4rem;
    color: #1273eb;
    display: block;
    line-height: 1;
}

.calc-hero__card.is-active i {
    color: #fff;
}

.calc-hero__card span {
    font-size: 0.8rem;
    font-weight: 700;
    color: #0b1f3a;
    line-height: 1.25;
}

.calc-hero__card.is-active span {
    color: #fff;
}

/* Main panel */
.calc-tools {
    background: #fff;
    border-radius: 20px;
    border: 1px solid #e3ecf5;
    box-shadow: 0 16px 48px rgba(11, 31, 58, 0.1);
    overflow: hidden;
    position: relative;
    z-index: 1;
}

/* Tab bar — hidden on desktop (hero cards used), visible on mobile */
.calc-tools__tabs {
    display: none;
    list-style: none;
    margin: 0;
    padding: 12px 12px 0;
    background: #0b1f3a;
    gap: 8px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    flex-wrap: nowrap;
}

.calc-tools__tabs::-webkit-scrollbar {
    display: none;
}

.calc-tools__tabs li {
    flex: 0 0 auto;
    min-width: 0;
}

.calc-tools-area .calc-tools__tabs button {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    min-width: 88px;
    min-height: 64px;
    padding: 10px 14px;
    border: 2px solid transparent !important;
    border-radius: 12px 12px 0 0 !important;
    background: rgba(255, 255, 255, 0.08) !important;
    color: rgba(255, 255, 255, 0.75) !important;
    font-size: 0.72rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s ease;
    -webkit-appearance: none;
    appearance: none;
    outline: none;
    box-shadow: none !important;
}

.calc-tools-area .calc-tools__tabs button i {
    font-size: 1.1rem;
    display: block;
    margin: 0;
    opacity: 0.9;
}

.calc-tools-area .calc-tools__tabs button:hover {
    background: rgba(255, 255, 255, 0.16) !important;
    color: #fff !important;
}

.calc-tools-area .calc-tools__tabs button.active {
    background: #fff !important;
    color: #0b1f3a !important;
    border-color: #e3ecf5 !important;
}

.calc-tools-area .calc-tools__tabs button.active i {
    color: #1273eb;
}

.calc-tools__panel {
    display: none;
    padding: 32px 28px 36px;
}

.calc-tools__panel.active {
    display: block;
    animation: calcFadeIn 0.3s ease;
}

@keyframes calcFadeIn {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: translateY(0); }
}

.calc-panel-head {
    margin-bottom: 24px;
    padding-bottom: 18px;
    border-bottom: 1px solid #eef2f7;
}

.calc-panel-head h2 {
    margin: 0 0 8px;
    font-size: 1.3rem;
    font-weight: 700;
    color: #0b1f3a;
}

.calc-panel-head p {
    margin: 0;
    font-size: 0.9rem;
    color: #6b7c8f;
    line-height: 1.55;
    max-width: 520px;
}

/* Preset buttons */
.calc-presets {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 22px;
}

.calc-presets__label {
    width: 100%;
    font-size: 0.72rem;
    font-weight: 700;
    color: #8a9bab;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 2px;
}

.calc-tools-area .calc-preset-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 38px;
    padding: 9px 18px !important;
    border: 2px solid #dce6f0 !important;
    border-radius: 24px !important;
    background: #fff !important;
    color: #0b1f3a !important;
    font-size: 0.82rem !important;
    font-weight: 700 !important;
    line-height: 1.2;
    cursor: pointer;
    transition: all 0.2s ease;
    -webkit-appearance: none;
    appearance: none;
    outline: none;
    box-shadow: 0 2px 6px rgba(11, 31, 58, 0.05) !important;
}

.calc-tools-area .calc-preset-btn:hover {
    border-color: #1273eb !important;
    background: #eef5ff !important;
    color: #1273eb !important;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(18, 115, 235, 0.15) !important;
}

.calc-tools-area .calc-preset-btn:active {
    transform: translateY(0);
}

/* Form */
.calc-form {
    background: #f8fafc;
    border: 1px solid #e8eef5;
    border-radius: 16px;
    padding: 24px 20px;
}

.calc-form .form-group {
    margin-bottom: 18px;
}

.calc-form label {
    font-weight: 600;
    font-size: 0.85rem;
    color: #0b1f3a;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.calc-form label small {
    font-weight: 500;
    color: #8a9bab;
    font-size: 0.75rem;
}

.calc-form .form-control {
    border-radius: 10px;
    border: 1px solid #d0dce8;
    padding: 12px 14px;
    font-size: 0.95rem;
    background: #fff;
    width: 100%;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.calc-form .form-control:focus {
    border-color: #1273eb;
    box-shadow: 0 0 0 3px rgba(18, 115, 235, 0.15);
    outline: none;
}

.calc-range-wrap {
    display: flex;
    align-items: center;
    gap: 12px;
}

.calc-range-wrap input[type="range"] {
    flex: 1;
    height: 6px;
    accent-color: #1273eb;
    cursor: pointer;
}

.calc-range-val {
    min-width: 44px;
    text-align: center;
    font-weight: 700;
    color: #1273eb;
    font-size: 0.9rem;
    background: #eef5ff;
    padding: 4px 8px;
    border-radius: 8px;
}

.calc-form__hint {
    font-size: 0.78rem;
    color: #8a9bab;
    margin-top: 6px;
    display: block;
}

.calc-form__error {
    display: none;
    background: #fff5f5;
    border: 1px solid #fecaca;
    color: #b91c1c;
    font-size: 0.82rem;
    padding: 10px 14px;
    border-radius: 10px;
    margin-bottom: 16px;
}

.calc-form__error.is-show {
    display: block;
}

/* Calculate button */
.calc-tools-area .calc-btn-calc {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    min-height: 50px;
    padding: 14px 24px !important;
    border: none !important;
    border-radius: 12px !important;
    background: linear-gradient(135deg, #1273eb 0%, #0b1f3a 100%) !important;
    color: #fff !important;
    font-size: 1rem !important;
    font-weight: 700 !important;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    box-shadow: 0 4px 16px rgba(18, 115, 235, 0.35) !important;
    -webkit-appearance: none;
    appearance: none;
    outline: none;
}

.calc-tools-area .calc-btn-calc:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(18, 115, 235, 0.45) !important;
    color: #fff !important;
}

.calc-tools-area .calc-btn-calc i {
    margin-right: 8px;
}

/* Results */
.calc-results {
    background: #fff;
    border: 2px dashed #dce6f0;
    border-radius: 16px;
    padding: 24px 22px;
    min-height: 300px;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.calc-results.is-visible {
    border-style: solid;
    border-color: #1273eb;
    box-shadow: 0 12px 40px rgba(18, 115, 235, 0.1);
}

.calc-results__head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 18px;
}

.calc-results__head h3 {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 700;
    color: #0b1f3a;
}

.calc-tools-area .calc-btn-icon {
    width: 38px;
    height: 38px;
    border: 2px solid #dce6f0 !important;
    border-radius: 10px !important;
    background: #f8fafc !important;
    color: #5a6b7d !important;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    -webkit-appearance: none;
    appearance: none;
    padding: 0 !important;
}

.calc-tools-area .calc-btn-icon:hover {
    border-color: #1273eb !important;
    color: #1273eb !important;
    background: #eef5ff !important;
}

.calc-results__empty {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 20px;
    color: #8a9bab;
}

.calc-results.is-visible .calc-results__empty {
    display: none;
}

.calc-results__empty i {
    font-size: 2.2rem;
    color: #c5d5e8;
    margin-bottom: 12px;
}

.calc-results__body {
    display: none;
}

.calc-results.is-visible .calc-results__body {
    display: block;
}

.calc-highlight {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    margin-bottom: 18px;
}

.calc-highlight__item {
    background: linear-gradient(135deg, #eef5ff 0%, #f8fbff 100%);
    border: 1px solid #d4e4f7;
    border-radius: 12px;
    padding: 14px;
    text-align: center;
}

.calc-highlight__item--primary {
    grid-column: 1 / -1;
    background: linear-gradient(135deg, #0b1f3a 0%, #1273eb 100%);
    border: none;
    color: #fff;
}

.calc-highlight__label {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    opacity: 0.85;
    margin-bottom: 6px;
}

.calc-highlight__value {
    font-size: 1rem;
    font-weight: 700;
    line-height: 1.35;
}

.calc-results__list {
    margin: 0 0 16px;
}

.calc-results__list > div {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 8px;
    padding: 12px 14px;
    margin-bottom: 8px;
    background: #f8fafc;
    border-radius: 10px;
}

.calc-results__list dt {
    font-weight: 600;
    font-size: 0.84rem;
    color: #5a6b7d;
    margin: 0;
    flex: 0 0 42%;
}

.calc-results__list dd {
    margin: 0;
    font-weight: 700;
    font-size: 0.9rem;
    color: #0b1f3a;
    text-align: right;
    flex: 1 1 50%;
}

.calc-disclaimer {
    font-size: 0.78rem;
    color: #8a9bab;
    padding: 12px 14px;
    background: #f8fafc;
    border-radius: 10px;
    border-left: 3px solid #04d7f2;
    margin-bottom: 14px;
}

.calc-results__footer {
    margin-top: auto;
    padding-top: 14px;
    border-top: 1px solid #eef2f7;
}

.calc-cta-strip {
    margin-top: 40px;
    background: linear-gradient(135deg, #0b1f3a 0%, #1273eb 100%);
    border-radius: 16px;
    padding: 28px 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    flex-wrap: wrap;
    color: #fff;
}

.calc-cta-strip h3 {
    margin: 0 0 6px;
    font-size: 1.15rem;
    font-weight: 700;
    color: #fff;
}

.calc-cta-strip p {
    margin: 0;
    opacity: 0.9;
    font-size: 0.9rem;
}

.calc-cta-strip .btn {
    background: #fff !important;
    color: #0b1f3a !important;
    font-weight: 700;
    padding: 12px 28px;
    border-radius: 10px;
    border: none !important;
}

.calc-seo-text {
    background: #fff;
    border: 1px solid #e3ecf5;
    border-radius: 16px;
    padding: 28px;
    margin-top: 40px;
}

.calc-seo-text h2 {
    font-size: 1.1rem;
    font-weight: 700;
    color: #0b1f3a;
    margin-bottom: 12px;
}

.calc-seo-links {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 14px;
}

.calc-seo-links a {
    font-size: 0.82rem;
    font-weight: 600;
    padding: 9px 16px;
    background: #f0f6fc;
    border-radius: 24px;
    color: #1273eb;
    border: 2px solid #dce6f0;
    text-decoration: none;
    transition: all 0.2s;
}

.calc-seo-links a:hover {
    background: #1273eb;
    color: #fff;
    border-color: #1273eb;
}

/* Tablet */
@media (max-width: 991px) {
    .calc-hero__cards {
        grid-template-columns: repeat(2, 1fr);
    }

    .calc-highlight {
        grid-template-columns: 1fr;
    }

    .calc-results {
        margin-top: 20px;
    }
}

/* Mobile */
@media (max-width: 767px) {
    .calc-hero__cards {
        display: none;
    }

    .calc-tools__tabs {
        display: flex;
    }

    .calc-tools__panel {
        padding: 20px 16px 24px;
    }

    .calc-panel-head h2 {
        font-size: 1.15rem;
    }

    .calc-presets {
        gap: 8px;
    }

    .calc-tools-area .calc-preset-btn {
        flex: 1 1 calc(50% - 8px);
        min-width: calc(50% - 8px);
        font-size: 0.76rem !important;
        padding: 8px 12px !important;
    }

    .calc-results__list > div {
        flex-direction: column;
        align-items: flex-start;
    }

    .calc-results__list dd {
        text-align: left;
    }

    .calc-cta-strip {
        padding: 22px 18px;
        text-align: center;
        justify-content: center;
    }
}

@media (min-width: 768px) {
    .calc-tools__tabs {
        display: none;
    }
}