@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

:root {
    --kenbri-red: #b61f24;
    --kenbri-red-dark: #8f171b;
    --kenbri-red-soft: #f6e8e9;

    --kenbri-anthracite: #1f2328;
    --kenbri-anthracite-2: #2b3138;
    --kenbri-steel: #5f6873;

    --kenbri-bg: #f3f4f6;
    --kenbri-surface: #ffffff;
    --kenbri-surface-soft: #f8f9fa;
    --kenbri-border: #d9dde2;

    --kenbri-text: #1f2328;
    --kenbri-text-soft: #66707c;
    --kenbri-white: #ffffff;

    --kenbri-shadow-lg: 0 24px 60px rgba(20, 24, 28, 0.14);
    --kenbri-shadow-md: 0 12px 30px rgba(20, 24, 28, 0.10);
    --kenbri-shadow-sm: 0 6px 16px rgba(20, 24, 28, 0.08);

    --radius-xl: 24px;
    --radius-lg: 18px;
    --radius-md: 12px;
    --radius-sm: 10px;

    --transition: 180ms ease;
}

html,
body {
    min-height: 100%;
}

body {
    margin: 0;
    font-family: 'Inter', Arial, sans-serif;
    color: var(--kenbri-text);
    background:
        radial-gradient(circle at top left, rgba(182, 31, 36, 0.07), transparent 32%),
        linear-gradient(180deg, #f7f7f8 0%, #f1f3f5 100%);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Reset Bootstrap feel */
.container,
.row,
.col-md-6,
.offset-md-3,
.form-group,
.form-control,
.btn,
.alert,
.navbar,
.navbar-brand {
    box-sizing: border-box;
}

main {
    min-height: calc(100vh - 72px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px 16px 56px;
}

.container {
    max-width: 1200px;
    width: 100%;
    padding: 0;
}

.row {
    margin: 0;
    display: flex;
    justify-content: center;
}

.col-md-6.offset-md-3 {
    margin: 0;
    max-width: 560px;
    width: 100%;
    flex: 0 0 100%;
    padding: 34px 34px 30px;
    border-radius: var(--radius-xl);
    background: linear-gradient(180deg, #ffffff 0%, #fcfcfc 100%);
    border: 1px solid rgba(31, 35, 40, 0.08);
    box-shadow: var(--kenbri-shadow-lg);
    position: relative;
    overflow: hidden;
}

.col-md-6.offset-md-3::before {
    content: "";
    position: absolute;
    inset: 0 0 auto 0;
    height: 7px;
    background: linear-gradient(90deg, var(--kenbri-red-dark) 0%, var(--kenbri-red) 100%);
}

.col-md-6.offset-md-3::after {
    content: "";
    position: absolute;
    top: -90px;
    right: -90px;
    width: 220px;
    height: 220px;
    background: radial-gradient(circle, rgba(182, 31, 36, 0.08), transparent 70%);
    pointer-events: none;
}

/* Navbar */
.navbar {
    min-height: 72px;
    padding: 0 20px;
    background: linear-gradient(135deg, var(--kenbri-anthracite) 0%, #14181c 100%) !important;
    border-bottom: 4px solid var(--kenbri-red);
    box-shadow: 0 10px 24px rgba(0, 0, 0, 0.16);
    display: flex;
    align-items: center;
    justify-content: center;
}

.navbar-brand {
    display: none;
}

.navbar .img-fluid {
    display: block;
    max-height: 42px !important;
    width: auto;
    filter: drop-shadow(0 3px 6px rgba(0, 0, 0, 0.18));
}

/* Heading */
h1 {
    margin: 0 0 28px !important;
    text-align: center;
    font-size: 2rem;
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.03em;
    color: var(--kenbri-anthracite);
}

h1::after {
    content: "";
    display: block;
    width: 72px;
    height: 4px;
    margin: 14px auto 0;
    border-radius: 999px;
    background: var(--kenbri-red);
}

/* Top switch */
.d-flex.mb-3 {
    display: grid !important;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-bottom: 24px !important;
    padding: 8px;
    border-radius: 16px;
    background: #f1f3f5;
    border: 1px solid var(--kenbri-border);
}

.d-flex.mb-3 .btn {
    margin: 0 !important;
    width: 100%;
}

/* Buttons - fully custom */
.btn {
    appearance: none;
    border: 0;
    outline: 0;
    border-radius: 12px !important;
    min-height: 48px;
    padding: 12px 16px;
    font-family: inherit;
    font-size: 0.96rem;
    font-weight: 700;
    line-height: 1.2;
    transition:
        background-color var(--transition),
        color var(--transition),
        border-color var(--transition),
        box-shadow var(--transition),
        transform var(--transition);
    box-shadow: none !important;
    text-decoration: none;
}

.btn:hover {
    transform: translateY(-1px);
}

.btn:focus,
.btn.focus,
.btn:active:focus {
    outline: none;
    box-shadow: 0 0 0 4px rgba(182, 31, 36, 0.12) !important;
}

.btn-primary {
    background: linear-gradient(135deg, var(--kenbri-red) 0%, var(--kenbri-red-dark) 100%) !important;
    color: var(--kenbri-white) !important;
    border: 1px solid var(--kenbri-red-dark) !important;
    box-shadow: 0 12px 24px rgba(182, 31, 36, 0.20) !important;
}

.btn-primary:hover,
.btn-primary:focus,
.btn-primary:active {
    background: linear-gradient(135deg, #c72429 0%, #97191d 100%) !important;
    border-color: #97191d !important;
    color: var(--kenbri-white) !important;
}

.btn-outline-primary {
    background: var(--kenbri-surface) !important;
    color: var(--kenbri-anthracite) !important;
    border: 1px solid var(--kenbri-border) !important;
}

.btn-outline-primary:hover,
.btn-outline-primary:focus,
.btn-outline-primary:active {
    background: #f7f8fa !important;
    color: var(--kenbri-red) !important;
    border-color: #cfd5dc !important;
}

.btn-secondary {
    background: #eef1f4 !important;
    color: var(--kenbri-anthracite-2) !important;
    border: 1px solid #d7dde3 !important;
}

.btn-secondary:hover,
.btn-secondary:focus,
.btn-secondary:active {
    background: #e5e9ee !important;
    color: var(--kenbri-anthracite) !important;
    border-color: #cfd5dc !important;
}

.btn-block {
    display: inline-flex !important;
    width: 100%;
    justify-content: center;
    align-items: center;
}

/* Forms */
form {
    margin: 0;
}

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

label {
    display: inline-block;
    margin-bottom: 8px;
    font-size: 0.93rem;
    font-weight: 700;
    color: var(--kenbri-anthracite);
}

.form-control {
    display: block;
    width: 100%;
    min-height: 50px;
    padding: 13px 15px;
    border-radius: 12px;
    border: 1px solid var(--kenbri-border);
    background: var(--kenbri-surface);
    color: var(--kenbri-text);
    font-family: inherit;
    font-size: 0.96rem;
    line-height: 1.4;
    transition:
        border-color var(--transition),
        box-shadow var(--transition),
        background-color var(--transition);
    box-shadow: inset 0 1px 2px rgba(20, 24, 28, 0.03);
}

.form-control::placeholder {
    color: #8a949f;
    opacity: 1;
}

.form-control:hover {
    border-color: #c5ccd4;
}

.form-control:focus {
    background: #fff;
    color: var(--kenbri-text);
    border-color: var(--kenbri-red);
    box-shadow: 0 0 0 4px rgba(182, 31, 36, 0.10);
    outline: none;
}

/* OTP */
#loginOtp,
#registerOtp {
    text-align: center;
    font-size: 1.08rem;
    font-weight: 800;
    letter-spacing: 0.28em;
}

/* Password help */
.form-text,
.text-muted {
    display: block;
    margin-top: 7px;
    color: var(--kenbri-text-soft) !important;
    font-size: 0.84rem;
    line-height: 1.45;
}

/* Alerts */
.alert {
    margin-bottom: 18px;
    padding: 14px 16px;
    border-radius: 14px;
    border: 1px solid transparent;
    font-size: 0.93rem;
    line-height: 1.45;
}

.alert-info {
    background: #f6f7f8 !important;
    border-color: #dfe4e8 !important;
    color: var(--kenbri-anthracite) !important;
    box-shadow: none;
    position: relative;
    padding-left: 18px;
}

.alert-info::before {
    content: "";
    position: absolute;
    top: 12px;
    bottom: 12px;
    left: 0;
    width: 4px;
    border-radius: 999px;
    background: var(--kenbri-red);
}

.alert strong {
    color: var(--kenbri-red-dark);
    font-weight: 800;
}

/* Panels */
#loginPanel,
#loginOtpPanel,
#registerPanel,
#registerCompletePanel {
    animation: kenbriFade 0.22s ease;
}

/* Response message */
#responseMessage {
    margin-top: 18px !important;
    min-height: 24px;
    font-size: 0.94rem;
    font-weight: 600;
    color: var(--kenbri-anthracite);
}

/* Footer spacing */
#footer-container {
    margin-top: 24px;
}

/* Autofill */
input:-webkit-autofill,
input:-webkit-autofill:hover,
input:-webkit-autofill:focus,
textarea:-webkit-autofill,
select:-webkit-autofill {
    -webkit-text-fill-color: var(--kenbri-text);
    -webkit-box-shadow: 0 0 0px 1000px #ffffff inset;
    transition: background-color 9999s ease-in-out 0s;
}

/* Animation */
@keyframes kenbriFade {
    from {
        opacity: 0;
        transform: translateY(6px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Tablet */
@media (max-width: 991.98px) {
    main {
        padding-top: 32px;
        padding-bottom: 40px;
    }

    .col-md-6.offset-md-3 {
        max-width: 600px;
        padding: 28px 26px 24px;
    }

    h1 {
        font-size: 1.8rem;
    }
}

/* Mobile */
@media (max-width: 767.98px) {
    .navbar {
        min-height: 64px;
        padding: 0 14px;
    }

    .navbar .img-fluid {
        max-height: 34px !important;
    }

    main {
        align-items: flex-start;
        padding: 20px 12px 32px;
    }

    .col-md-6.offset-md-3 {
        max-width: 100%;
        padding: 22px 16px 18px;
        border-radius: 18px;
    }

    h1 {
        font-size: 1.6rem;
        margin-bottom: 22px !important;
    }

    .d-flex.mb-3 {
        grid-template-columns: 1fr;
        gap: 8px;
        padding: 0;
        border: 0;
        background: transparent;
    }

    .form-control {
        font-size: 16px;
    }
}

/* Very small screens */
@media (max-width: 420px) {
    .col-md-6.offset-md-3 {
        padding: 18px 14px 16px;
    }

    h1 {
        font-size: 1.45rem;
    }

    .btn {
        min-height: 46px;
        font-size: 0.93rem;
    }
}