:root {
    --primary-color: #2d8659;
    --primary-dark: #1f5d3f;
    --primary-light: #4caf50;
    --secondary-color: #ff6b35;
    --accent-color: #f7931e;
    --text-dark: #2c3e50;
    --text-light: #7f8c8d;
    --bg-light: #f8f9fa;
    --white: #ffffff;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.2);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);

    --cas-accent: var(--primary-color);
    --cas-accent-2: var(--primary-dark);
    --cas-ink: var(--text-dark);
    --cas-ink-soft: var(--text-light);
    --cas-border: rgba(45, 134, 89, 0.25);
    --cas-bg-glass: linear-gradient(145deg, rgba(255, 255, 255, 0.83), rgba(248, 249, 250, 0.7));
    --cas-shadow: 0 18px 38px rgba(31, 93, 63, 0.16), var(--shadow-md);
    --cas-radius-lg: 20px;
    --cas-radius-md: 12px;
    --cas-transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.cas-card {
    position: relative;
    overflow: hidden;
    max-width: 560px;
    margin: clamp(14px, 2vw, 28px) auto;
    padding: clamp(18px, 2.8vw, 28px);
    border-radius: var(--cas-radius-lg);
    border: 1px solid var(--cas-border);
    background: var(--cas-bg-glass);
    box-shadow: var(--cas-shadow);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

.cas-card::before,
.cas-card::after {
    content: "";
    position: absolute;
    border-radius: 999px;
    pointer-events: none;
}

.cas-card::before {
    width: 220px;
    height: 220px;
    inset: -110px auto auto -110px;
    background: radial-gradient(circle, rgba(45, 134, 89, 0.28), rgba(45, 134, 89, 0));
}

.cas-card::after {
    width: 180px;
    height: 180px;
    inset: auto -90px -90px auto;
    background: radial-gradient(circle, rgba(247, 147, 30, 0.24), rgba(247, 147, 30, 0));
}

.cas-card-head {
    position: relative;
    z-index: 1;
    margin-bottom: 16px;
}

.cas-title {
    margin: 0;
    font-size: clamp(20px, 2.3vw, 24px);
    line-height: 1.2;
    color: var(--cas-ink);
}

.cas-subtitle {
    margin: 8px 0 0;
    font-size: 14px;
    color: var(--cas-ink-soft);
}

.cas-account-type,
.cas-wholesale-mode {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    margin-bottom: 14px;
}

.cas-account-type label,
.cas-wholesale-mode label {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 11px 12px;
    border: 1px solid var(--cas-border);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.66);
    color: var(--cas-ink);
    font-size: 13px;
    cursor: pointer;
    transition: all var(--cas-transition);
}
.cas-radio-label {
    display: inline-flex; /* قرار دادن المان‌ها در یک خط */
    align-items: center;  /* تراز عمودی دقیق در وسط */
    gap: 8px;            /* فاصله دقیق و دلخواه بین دکمه و متن */
    cursor: pointer;
    margin-bottom: 10px;
    font-size: 13px;
    color: var(--cas-ink);
    padding: 11px 12px;
    border: 1px solid var(--cas-border);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.66);
}

.cas-radio-label input[type="radio"] {
    width: auto !important; /* جلوگیری از کشیده شدن دکمه */
    margin: 0;              /* حذف مارجین‌های پیش‌فرض مرورگر */
}

.cas-account-type label:hover,
.cas-wholesale-mode label:hover {
    border-color: rgba(45, 134, 89, 0.48);
    transform: translateY(-1px);
}

.cas-account-type input,
.cas-wholesale-mode input {
    accent-color: var(--cas-accent);
}

.cas-section {
    position: relative;
    z-index: 1;
}

.cas-field-label {
    display: inline-block;
    margin: 2px 0 8px;
    font-size: 13px;
    font-weight: 600;
    color: var(--cas-ink);
}

.cas-section input {
    width: 100%;
    margin-bottom: 12px;
    padding: 12px 14px;
    border: 1px solid var(--cas-border);
    border-radius: var(--cas-radius-md);
    background: rgba(255, 255, 255, 0.86);
    color: var(--cas-ink);
    font-size: 14px;
    transition: border-color var(--cas-transition), box-shadow var(--cas-transition), background var(--cas-transition);
}

.cas-section input::placeholder {
    color: #95a5a6;
}

.cas-section input:focus {
    outline: none;
    border-color: rgba(45, 134, 89, 0.7);
    box-shadow: 0 0 0 4px rgba(76, 175, 80, 0.18);
    background: #ffffff;
}

.cas-btn,
.cas-section button {
    position: relative;
    width: 100%;
    margin-top: 2px;
    border: 0;
    border-radius: var(--cas-radius-md);
    padding: 12px 18px;
    color: #ffffff;
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 0.2px;
    background: linear-gradient(135deg, var(--cas-accent), var(--cas-accent-2));
    box-shadow: 0 12px 22px rgba(31, 93, 63, 0.27);
    cursor: pointer;
    transition: transform var(--cas-transition), box-shadow var(--cas-transition), filter var(--cas-transition);
}

.cas-btn:hover,
.cas-section button:hover {
    transform: translateY(-1px);
    box-shadow: 0 14px 24px rgba(31, 93, 63, 0.36);
    filter: saturate(1.08);
}

.cas-wholesale-mode {
    gap: 8px;
    margin-bottom: 8px;
}

.cas-wholesale-mode label {
    padding: 8px 10px;
    border-radius: 12px;
}

.cas-btn:active,
.cas-section button:active {
    transform: translateY(0);
}

.cas-btn:disabled,
.cas-section button:disabled {
    opacity: 0.86;
    cursor: not-allowed;
}

.cas-btn.is-loading,
.cas-section button.is-loading {
    pointer-events: none;
    padding-right: 46px;
}

.cas-btn.is-loading::after,
.cas-section button.is-loading::after {
    content: "";
    position: absolute;
    top: 50%;
    right: 16px;
    width: 16px;
    height: 16px;
    margin-top: -8px;
    border-radius: 999px;
    border: 2px solid rgba(255, 255, 255, 0.35);
    border-top-color: #ffffff;
    animation: cas-spin 0.75s linear infinite;
}

body.rtl .cas-btn.is-loading,
body.rtl .cas-section button.is-loading {
    padding-right: 18px;
    padding-left: 46px;
}

body.rtl .cas-btn.is-loading::after,
body.rtl .cas-section button.is-loading::after {
    right: auto;
    left: 16px;
}

#cas-otp-section {
    margin-top: 14px;
    padding-top: 14px;
    border-top: 1px dashed rgba(45, 134, 89, 0.28);
}

#cas-message {
    position: relative;
    z-index: 1;
    display: none;
    min-height: 0;
    margin-top: 14px;
    border-radius: 12px;
    padding: 10px 12px;
    font-size: 13px;
    line-height: 1.45;
    color: var(--cas-ink-soft);
    background: rgba(248, 250, 252, 0.78);
    border: 1px solid rgba(148, 163, 184, 0.22);
}

#cas-message.cas-success {
    color: #166534;
    background: rgba(236, 253, 245, 0.82);
    border-color: rgba(22, 101, 52, 0.18);
}

#cas-message.cas-error {
    color: #991b1b;
    background: rgba(254, 242, 242, 0.86);
    border-color: rgba(153, 27, 27, 0.18);
}

@keyframes cas-spin {
    to {
        transform: rotate(360deg);
    }
}

@media (max-width: 767px) {
    .cas-card {
        border-radius: 16px;
        padding: 16px;
    }

    .cas-wholesale-mode {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .cas-account-type {
        grid-template-columns: 1fr;
    }
}