:root {
    /* LOGO */
    --gold-glow: #ffd700;

    /* Main parts */
    --main-background: #e1e5ee;
    --main-glass-divider: linear-gradient(90deg, transparent, rgba(0, 255, 255, 0.8), transparent);
    --main-elements-bg-color: #0f172a;
    --main-cards-bg: #12203d;
    --main-cards-box-border: 1px solid rgba(0, 243, 255, 0.3);
    --main-cards-box-shadow: 0 0 30px rgba(0, 243, 255, 0.1), inset 0 0 20px rgba(0, 243, 255, 0.05);
    --main-bg-dis: rgba(255, 255, 255, 0.02);

    --text-main-color: #fff;
    --text-two-color: #94a3b8;
    --text-hover-color: #00f3ff;
    --text-shadow-color: 0 0 15px rgba(0, 243, 255, 0.6), 0 0 30px rgba(0, 243, 255, 0.2);

    /* explaning cards */
    --main-ex-bg: rgba(255, 255, 255, 0.02);
    --main-ex-border: 1px dashed rgba(0, 243, 255, 0.3);

    /* btn */
    --main-btn-color: rgba(0, 243, 255, 0.1);
    --main-btn-border-color: 1px solid #00f3ff;
    --main-btn-shadow: 0 0 15px rgba(0, 243, 255, 0.2);
    --main-btn-text-color: #fff;

    --main-btn-color-hover: #00f3ff;
    --main-btn-txt-color-hover: #000;
    --main-btn-shadow-hover: 0 0 5px #00f3ff, 0 0 20px #00f3ff;

    /* place holder and input */
    --place-holder-bg: rgba(0, 0, 0, 0.3);
    --place-holder-color: #fff;
    --place-holder-border: 1px solid rgba(255, 255, 255, 0.2);

    --place-holder-border-focus-color: #00e5ff;
    --place-holder-box-shadow-focus: 0 0 20px rgba(0, 243, 255, 0.3), inset 0 0 10px rgba(0, 243, 255, 0.1);

    --text-alert: #ff4757;
    --neon-green: #00ff88;
}

/* Master Container */
.taksir-master-container {
    max-width: 800px;
    margin: 40px auto;
    padding: 0 15px;
    font-family: Tahoma, Arial, sans-serif; /* در صورت داشتن فونت کاستوم، اینجا تغییر بده */
    direction: rtl;
}

/* Header Card (Title & Description) */
.taksir-header-card {
    background: var(--main-cards-bg);
    border: var(--main-cards-box-border);
    box-shadow: var(--main-cards-box-shadow);
    border-radius: 15px;
    padding: 25px;
    margin-bottom: 30px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.taksir-header-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 10%;
    right: 10%;
    height: 2px;
    background: var(--main-glass-divider);
}

.taksir-header-card h1 {
    color: var(--text-main-color);
    text-shadow: var(--text-shadow-color);
    margin: 0 0 15px 0;
    font-size: 1.8rem;
}

.taksir-header-card p {
    color: var(--text-two-color);
    background: var(--main-ex-bg);
    border: var(--main-ex-border);
    padding: 15px;
    border-radius: 10px;
    font-size: 0.95rem;
    line-height: 1.6;
    margin: 0;
}

/* Tool Card (The Form itself) */
.taksir-tool-card {
    background: var(--main-cards-bg);
    border: var(--main-cards-box-border);
    box-shadow: var(--main-cards-box-shadow);
    border-radius: 15px;
    padding: 30px;
}

/* Form Groups & Inputs */
.form-group {
    margin-bottom: 20px;
    display: flex;
    flex-direction: column;
}

.form-row {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.half-width {
    flex: 1;
    min-width: 120px;
}

.form-group label {
    color: var(--text-main-color);
    margin-bottom: 8px;
    font-size: 0.9rem;
    text-shadow: 0 0 5px rgba(255,255,255,0.2);
}

.form-control {
    background: var(--place-holder-bg);
    color: var(--place-holder-color);
    border: var(--place-holder-border);
    padding: 12px 15px;
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s ease;
    outline: none;
}

.form-control::placeholder {
    color: rgba(255, 255, 255, 0.4);
}

.form-control:focus {
    border-color: var(--place-holder-border-focus-color);
    box-shadow: var(--place-holder-box-shadow-focus);
}

/* Dropdown specific fix for dark mode */
select.form-control option {
    background: var(--main-elements-bg-color);
    color: var(--text-main-color);
}

/* Button */
.btn-submit {
    width: 100%;
    background: var(--main-btn-color);
    border: var(--main-btn-border-color);
    color: var(--main-btn-text-color);
    box-shadow: var(--main-btn-shadow);
    padding: 15px;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 10px;
}

.btn-submit:hover {
    background: var(--main-btn-color-hover);
    color: var(--main-btn-txt-color-hover);
    box-shadow: var(--main-btn-shadow-hover);
}

/* Result Box */
.result-box {
    margin-top: 30px;
    background: rgba(0, 255, 136, 0.05);
    border: 1px solid var(--neon-green);
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 0 15px rgba(0, 255, 136, 0.1);
}

.result-box h4 {
    color: var(--neon-green);
    margin-top: 0;
    margin-bottom: 15px;
    text-shadow: 0 0 10px rgba(0, 255, 136, 0.4);
}

#resultText {
    color: var(--text-main-color);
    font-size: 1.1rem;
    word-break: break-all;
}

.hidden-fields {
    display: none;
}

/* Responsive adjustments */
@media (max-width: 600px) {
    .taksir-master-container {
        margin: 20px auto;
    }
    
    .form-row {
        flex-direction: column;
        gap: 0;
    }
    
    .taksir-header-card h1 {
        font-size: 1.4rem;
    }
}