:root {
    --primary: #23458b;
    --primary-dark: #19356e;
    --secondary: #7f56a5;
    --soft-blue: #eaf1fb;
    --soft-blue-2: #f4f7fd;
    --soft-purple: #f5f0fa;
    --text-main: #1f2a44;
    --text-muted: #667085;
    --border-soft: #dbe5f2;
    --input-bg: #f9fbff;
    --shadow-lg: 0 1.5rem 3rem rgba(18, 38, 63, .14);
    --shadow-md: 0 .75rem 1.75rem rgba(18, 38, 63, .10);
    --radius-xl: 28px;
    --radius-lg: 22px;
    --radius-md: 16px;
}

/* =========================
   Base
========================= */
*,
*::before,
*::after {
    box-sizing: border-box;
}

html,
body {
    height: 100%;
}

body {
    margin: 0;
    font-family: "Sarabun", sans-serif;
    color: var(--text-main);
    background: radial-gradient(circle at top left, rgba(127, 86, 165, .10), transparent 30%), radial-gradient(circle at bottom right, rgba(35, 69, 139, .10), transparent 30%), linear-gradient(135deg, #f5f7fb 0%, #eef4ff 48%, #f8fbff 100%);
}

/* =========================
   Page Layout
========================= */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: stretch;
    padding: 1rem;
}

.login-container-fluid {
    display: flex;
    padding-left: 0;
    padding-right: 0;
}

.login-wrapper {
    width: 100%;
    min-height: calc(100vh - 2rem);
    overflow: hidden;
    border: 1px solid rgba(219, 229, 242, .9);
    border-radius: var(--radius-xl);
    background: rgba(255, 255, 255, .92);
    box-shadow: var(--shadow-lg);
    backdrop-filter: blur(10px);
}

.login-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(400px, 460px);
    min-height: calc(100vh - 2rem);
}

/* =========================
   Brand / Left Panel
========================= */
.brand-panel {
    position: relative;
    display: flex;
    flex-direction: column;
    padding: 2rem 2.25rem 1.75rem;
    background: linear-gradient(180deg, rgba(255, 255, 255, .98) 0%, rgba(244, 247, 253, .98) 100%);
}

    .brand-panel::before {
        content: "";
        position: absolute;
        inset: 0;
        background: radial-gradient(circle at 15% 15%, rgba(127, 86, 165, .08), transparent 25%), radial-gradient(circle at 85% 10%, rgba(35, 69, 139, .08), transparent 22%);
        pointer-events: none;
    }

.brand-content {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    width: 100%;
    height: 100%;
    max-width: 100%;
}

.logo-row {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
}

.logo-card {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 96px;
    height: 96px;
    flex: 0 0 auto;
    padding: .4rem;
    border: 1px solid rgba(219, 229, 242, .95);
    border-radius: 50%;
    background: #fff;
    box-shadow: 0 .75rem 1.5rem rgba(31, 42, 68, .08);
}

    .logo-card img {
        width: 100%;
        height: 100%;
        object-fit: contain;
        border-radius: 50%;
    }

.title-banner {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: 1.6rem 1.6rem 1.4rem;
    border: 1px solid #d8e4f4;
    border-radius: 24px;
    background: linear-gradient(180deg, #edf3fb 0%, #e5eef9 100%);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, .85);
    text-align: center;
}

.project-title {
    width: 100%;
    margin: 0;
    color: var(--primary-dark);
    font-size: clamp(1.2rem, 1.6vw, 1.8rem);
    line-height: 1.4;
    letter-spacing: -.01em;
    font-weight: 700;
    text-align: center;
}

.project-subtitle {
    width: 100%;
    margin: .95rem 0 0;
    color: #496186;
    font-size: 1rem;
    line-height: 1.7;
    text-align: center;
}

/* =========================
   Credit / Research Team
========================= */
.credit-grid {
    display: block;
    width: 100%;
    max-width: 1180px;
    margin: auto auto 0;
    padding-left: 2rem;
    padding-right: 2rem;
}

.credit-details {
    width: 100%;
    padding: 1rem 1.15rem;
    border: 1px solid var(--border-soft);
    border-radius: 20px;
    background: #fff;
    box-shadow: var(--shadow-md);
}

    .credit-details .head {
        margin-bottom: .75rem;
        color: var(--primary-dark);
        font-size: 1.05rem;
        font-weight: 700;
    }

.author-list {
    display: grid;
    gap: .65rem;
    margin: 0;
    padding: 0;
    list-style: none;
}

.author-item {
    display: grid;
    grid-template-columns: minmax(360px, 460px) minmax(0, 1fr);
    align-items: start;
    gap: .65rem 1rem;
    padding-bottom: .75rem;
    border-bottom: 1px dashed #d9e3f2;
}

    .author-item:last-child {
        padding-bottom: 0;
        border-bottom: 0;
    }

.author-name {
    padding-left: .75rem;
    color: #22365f;
    font-weight: 700;
    line-height: 1.5;
}

.author-role {
    color: var(--text-muted);
    font-size: .95rem;
    line-height: 1.55;
}

.fund-box {
    margin-top: 1.25rem;
    padding: .95rem 1.1rem;
    border: 1px solid #d6e1f3;
    border-radius: 18px;
    background: linear-gradient(180deg, #eaf1fb 0%, #e4edf9 100%);
    color: var(--primary-dark);
    font-weight: 700;
    line-height: 1.6;
    text-align: center;
}

/* =========================
   Form / Right Panel
========================= */
.form-panel {
    position: relative;
    padding: 1rem 1.75rem 1.75rem; /* เดิม 1.75rem รอบด้าน */
    background: linear-gradient(180deg, var(--primary) 0 170px, #fff 170px 100%);
    overflow: hidden; /* กันล้น */
}

    .form-panel::before {
        content: "";
        position: absolute;
        inset: 0;
        background: radial-gradient(circle at 80% 10%, rgba(255, 255, 255, .18), transparent 18%), radial-gradient(circle at 20% 8%, rgba(255, 255, 255, .12), transparent 16%);
        pointer-events: none;
    }

.form-shell {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 420px;
    margin: 0 auto;
    transform: translateY(-12px); /* ขยับทั้งก้อนขึ้น */
}

.form-top {
    display: flex;
    align-items: start;
    gap: 1rem;
    margin-bottom: 1rem; /* เดิม 1.2rem */
    padding: .1rem .15rem 0; /* เดิม .35rem .15rem 0 */
    color: #fff;
}

.form-top-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 58px;
    height: 58px;
    flex: 0 0 auto;
    border: 1px solid rgba(255, 255, 255, .18);
    border-radius: 18px;
    background: rgba(255, 255, 255, .18);
    box-shadow: 0 .75rem 1.5rem rgba(0, 0, 0, .08);
    font-size: 1.5rem;
}

.form-top-title {
    margin: 0 0 .2rem;
    font-size: 1.4rem;
    font-weight: 700;
    line-height: 1.3;
}

.form-top-subtitle {
    margin: 0;
    opacity: .88;
    font-size: .96rem;
    line-height: 1.6;
}

.form-card {
    padding: 1.55rem;
    border: 1px solid var(--border-soft);
    border-radius: 26px;
    background: #fff;
    box-shadow: var(--shadow-lg);
}

.form-card-header {
    margin-bottom: 1rem;
}

.form-badge {
    display: inline-flex;
    align-items: center;
    gap: .45rem;
    margin-bottom: .9rem;
    padding: .45rem .85rem;
    border: 1px solid #d9e5f6;
    border-radius: 999px;
    background: var(--soft-blue);
    color: var(--primary);
    font-size: .92rem;
    font-weight: 700;
}

.form-card-title {
    margin: 0;
    color: var(--text-main);
    font-size: 1.45rem;
    font-weight: 700;
}

.form-card-desc {
    margin: .45rem 0 0;
    color: var(--text-muted);
    font-size: .96rem;
    line-height: 1.65;
}

@media (max-width: 575.98px) {
    .form-panel {
        padding: .75rem 1rem 1rem;
        background: linear-gradient(180deg, var(--primary) 0 150px, #fff 150px 100%);
    }

    .form-shell {
        transform: translateY(-8px);
        max-width: 100%;
    }

    .form-top {
        gap: .75rem;
        margin-bottom: .85rem;
        padding-top: 0;
    }

    .form-top-icon {
        width: 50px;
        height: 50px;
        border-radius: 16px;
        font-size: 1.25rem;
    }

    .form-top-title {
        font-size: 1.2rem;
    }

    .form-top-subtitle {
        font-size: .9rem;
        line-height: 1.5;
    }
}

/* =========================
   Validation / Inputs
========================= */
.validation-summary-box.validation-summary-valid {
    display: none;
}

.validation-summary-box.validation-summary-errors {
    margin-bottom: 1rem;
    padding: .85rem 1rem;
    border: 1px solid #f4c7cd;
    border-radius: 16px;
    background: #fff5f6;
    color: #b42318;
    font-size: .94rem;
}

.validation-summary-box ul {
    margin: 0;
    padding-left: 1.1rem;
}

.form-label {
    margin-bottom: .45rem;
    color: var(--text-main);
    font-weight: 700;
}

.input-group {
    position: relative;
}

.input-group-text {
    display: flex;
    justify-content: center;
    min-width: 50px;
    border: 1px solid var(--border-soft);
    border-radius: 16px 0 0 16px;
    background: var(--soft-blue-2);
    color: var(--primary);
}

.form-control {
    min-height: 52px;
    border: 1px solid var(--border-soft);
    border-radius: 0 16px 16px 0;
    background: var(--input-bg);
    color: var(--text-main);
    box-shadow: none;
}

    .form-control:focus {
        border-color: #9fb7e4;
        background: #fff;
        box-shadow: 0 0 0 .25rem rgba(35, 69, 139, .10);
    }

.password-group .form-control {
    border-right: 0;
    border-radius: 0;
}

.password-toggle {
    min-width: 52px;
    border: 1px solid var(--border-soft);
    border-left: 0;
    border-radius: 0 16px 16px 0;
    background: var(--input-bg);
    color: #5c6b88;
}

    .password-toggle:hover,
    .password-toggle:focus {
        background: #fff;
        color: var(--primary);
    }

.text-danger.field-validation-error,
.text-danger.validation-error,
span.field-validation-error {
    display: block;
    margin-top: .4rem;
    font-size: .86rem;
}

.remember-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: .75rem;
    margin-top: .2rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.form-check-input {
    border-color: #b9c8df;
}

    .form-check-input:checked {
        border-color: var(--primary);
        background-color: var(--primary);
    }

.form-check-label {
    color: #44516b;
    font-size: .95rem;
}

.btn-login {
    min-height: 54px;
    border: 0;
    border-radius: 18px;
    background: linear-gradient(135deg, var(--primary) 0%, #305fc0 100%);
    box-shadow: 0 1rem 2rem rgba(35, 69, 139, .18);
    font-size: 1.02rem;
    font-weight: 700;
}

    .btn-login:hover,
    .btn-login:focus {
        background: linear-gradient(135deg, var(--primary-dark) 0%, #274f9d 100%);
    }

.login-note {
    margin-top: 1rem;
    padding: .9rem 1rem;
    border: 1px dashed #d9e3f2;
    border-radius: 16px;
    background: #f8fafc;
    color: var(--text-muted);
    font-size: .93rem;
    line-height: 1.6;
}

    .login-note strong {
        color: var(--primary-dark);
    }

.mobile-fund-box {
    display: none;
}

/* =========================
   Desktop vertical center
========================= */
@media (min-width: 992px) {
    .form-panel {
        display: flex;
        align-items: center;
        justify-content: center;
    }
}

/* =========================
   Responsive
========================= */
@media (max-width: 1199.98px) {
    .login-grid {
        grid-template-columns: minmax(0, 1fr) minmax(380px, 430px);
    }

    .brand-panel {
        padding: 1.75rem;
    }

    .form-shell {
        max-width: 400px;
    }
}

@media (max-width: 991.98px) {
    .login-page {
        padding: .85rem;
    }

    .login-wrapper,
    .login-grid {
        min-height: auto;
    }

    .login-grid {
        grid-template-columns: 1fr;
    }

    .brand-panel {
        padding: 1.4rem 1.4rem 1rem;
    }

    .form-panel {
        display: block;
        padding: 1rem 1.4rem 1.4rem;
        background: linear-gradient(180deg, var(--primary) 0 120px, #fff 120px 100%);
    }

    .form-shell {
        max-width: 100%;
    }

    .credit-grid {
        max-width: 100%;
        padding-left: 0;
        padding-right: 0;
    }

    .author-item {
        grid-template-columns: 1fr;
        gap: .2rem;
    }
}

@media (max-width: 575.98px) {
    .login-page {
        padding: .6rem;
    }

    .login-wrapper {
        min-height: calc(100vh - 1.2rem);
        border-radius: 22px;
    }

    .brand-panel {
        padding: 1rem .95rem .9rem;
    }

    .form-panel {
        padding: .75rem .95rem 1rem;
    }

    .logo-row {
        gap: .75rem;
        margin-bottom: 1rem;
    }

    .logo-card {
        width: 76px;
        height: 76px;
    }

    .title-banner {
        padding: 1rem;
        border-radius: 20px;
    }

    .project-title {
        font-size: 1.2rem;
        line-height: 1.35;
    }

    .project-subtitle {
        font-size: .94rem;
    }

    .credit-details,
    .form-card {
        border-radius: 18px;
    }

    .credit-details {
        padding: .95rem 1rem;
    }

    .form-top {
        gap: .75rem;
        margin-bottom: .95rem;
    }

    .form-top-icon {
        width: 50px;
        height: 50px;
        border-radius: 16px;
        font-size: 1.2rem;
    }

    .form-top-title {
        font-size: 1.18rem;
    }

    .form-top-subtitle {
        font-size: .9rem;
    }

    .form-card {
        padding: 1.15rem 1rem;
    }

    .form-card-title {
        font-size: 1.2rem;
    }

    .fund-box {
        display: none;
    }

    .mobile-fund-box {
        display: block;
        margin-top: 1rem;
    }
}