:root {
    --vt-navy:       #04385F;
    --vt-navy-deep:  #00253E;
    --vt-orange:     #F77F00;
    --vt-orange-dark:#D96E00;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: 'Sora', sans-serif;
    min-height: 100vh;
    display: flex;
    background: #F4F6FA;
}

.vt-signin-left {
    flex: 1;
    background: linear-gradient(145deg, var(--vt-navy-deep) 0%, var(--vt-navy) 55%, #0A6DAD 100%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 48px;
    position: relative;
    overflow: hidden;
}

.vt-signin-left::before {
    content: '';
    position: absolute;
    width: 420px; height: 420px;
    border-radius: 50%;
    border: 1px solid rgba(255,255,255,0.06);
    top: -100px; right: -100px;
}
.vt-signin-left::after {
    content: '';
    position: absolute;
    width: 260px; height: 260px;
    border-radius: 50%;
    background: rgba(247,127,0,0.08);
    bottom: -60px; left: -60px;
}

.vt-signin-brand {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
    position: relative;
    z-index: 1;
}

.vt-signin-logo-wrap {
    width: 76px; height: 76px;
    background: var(--vt-orange);
    border-radius: 20px;
    display: flex; align-items: center; justify-content: center;
    box-shadow: 0 8px 32px rgba(247,127,0,0.40);
    font-size: 32px; color: #fff;
}

.vt-signin-brand-name {
    font-size: 28px;
    font-weight: 300;
    color: #fff;
    letter-spacing: 3px;
    text-transform: uppercase;
    text-align: center;
}
.vt-signin-brand-name strong { font-weight: 700; color: var(--vt-orange); }

.vt-signin-tagline {
    font-size: 13px;
    color: rgba(255,255,255,0.45);
    letter-spacing: 0.5px;
    text-align: center;
    max-width: 280px;
    line-height: 1.6;
}

.vt-signin-features {
    display: flex;
    flex-direction: column;
    gap: 14px;
    margin-top: 40px;
    width: 100%;
    max-width: 300px;
}

.vt-signin-feature {
    display: flex;
    align-items: center;
    gap: 12px;
    color: rgba(255,255,255,0.65);
    font-size: 13px;
}

.vt-signin-feature-icon {
    width: 34px; height: 34px;
    border-radius: 8px;
    background: rgba(247,127,0,0.15);
    display: flex; align-items: center; justify-content: center;
    color: var(--vt-orange);
    font-size: 13px;
    flex-shrink: 0;
}

.vt-signin-right {
    flex: 1;
    width: 480px;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 48px 40px;
    background: #fff;
    box-shadow: -4px 0 40px rgba(4,56,95,0.08);
}

.vt-signin-form-wrap {
    width: 100%;
    max-width: 380px;
}

.vt-signin-form-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--vt-navy);
    margin-bottom: 6px;
}

.vt-signin-form-sub {
    font-size: 13px;
    color: #7A90A8;
    margin-bottom: 36px;
}

.vt-form-group { margin-bottom: 20px; }

.vt-form-group label {
    display: block;
    font-size: 11.5px;
    font-weight: 700;
    color: var(--vt-navy);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 7px;
}

.vt-input-wrap { position: relative; }

.vt-input-icon {
    position: absolute;
    left: 14px; top: 50%;
    transform: translateY(-50%);
    color: #B0BEC5;
    font-size: 14px;
    pointer-events: none;
}

.vt-input {
    width: 100%;
    padding: 11px 14px 11px 40px;
    border: 1.5px solid #E0E6EF;
    border-radius: 8px;
    font-family: 'Sora', sans-serif;
    font-size: 13px;
    color: #1A2A3A;
    background: #F8FAFC;
    transition: border-color .2s, box-shadow .2s;
    outline: none;
}

.vt-input:focus {
    border-color: var(--vt-orange);
    background: #fff;
    box-shadow: 0 0 0 3px rgba(247,127,0,0.12);
}

.vt-input.is-invalid { border-color: #E03C3C; }

.vt-input-toggle {
    position: absolute;
    right: 14px; top: 50%;
    transform: translateY(-50%);
    cursor: pointer;
    color: #B0BEC5;
    font-size: 14px;
    background: none; border: none; padding: 0;
    transition: color .2s;
}
.vt-input-toggle:hover { color: var(--vt-navy); }

.vt-input-pass { padding-right: 42px; }

.vt-alert-error {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    background: rgba(224,60,60,0.08);
    border: 1px solid rgba(224,60,60,0.25);
    border-left: 3px solid #E03C3C;
    border-radius: 8px;
    padding: 12px 14px;
    font-size: 13px;
    color: #b52d2d;
    margin-bottom: 22px;
}

.vt-forgot {
    display: block;
    text-align: right;
    font-size: 12px;
    color: var(--vt-orange);
    margin-top: -12px;
    margin-bottom: 26px;
    transition: color .2s;
}
.vt-forgot:hover { color: var(--vt-orange-dark); text-decoration: none; }

.vt-btn-signin {
    width: 100%;
    padding: 13px;
    background: var(--vt-orange);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-family: 'Sora', sans-serif;
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
    letter-spacing: 0.3px;
    box-shadow: 0 4px 16px rgba(247,127,0,0.32);
    transition: background .2s, transform .15s, box-shadow .2s;
    display: flex; align-items: center; justify-content: center; gap: 8px;
}

.vt-btn-signin:hover {
    background: var(--vt-orange-dark);
    transform: translateY(-1px);
    box-shadow: 0 6px 22px rgba(247,127,0,0.38);
}
.vt-btn-signin:active { transform: translateY(0); }

.vt-signin-footer {
    margin-top: 28px;
    text-align: center;
    font-size: 11.5px;
    color: #B0BEC5;
}

.modal-content { border: none; border-radius: 12px; overflow: hidden; }
.modal-body    { padding: 36px 32px; }

.vt-modal-icon {
    width: 60px; height: 60px;
    background: rgba(247,127,0,0.10);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 24px; color: var(--vt-orange);
    margin: 0 auto 18px;
}

#logo img {
    width: 80%;
    margin: 25px auto;
    display: block;
}

@media (max-width: 768px) {
    .vt-signin-left  { display: none; }
    .vt-signin-right { width: 100%; box-shadow: none; }
}