:root {
    --bv-bg: #090806;
    --bv-surface: #12100d;
    --bv-surface-light: #1b1814;
    --bv-border: rgba(255, 255, 255, 0.09);
    --bv-text: #ffffff;
    --bv-muted: #9d978f;
    --bv-orange: #f58220;
    --bv-orange-dark: #d96408;
    --bv-orange-soft: rgba(245, 130, 32, 0.14);
    --bv-danger: #ff5c5c;
    --bv-success: #49c77a;
}

/* Main login panel */
.panel {
    width: min(920px, calc(100% - 32px));
    min-height: 540px;
    margin: 40px auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    overflow: hidden;
    background: var(--bv-surface);
    border: 1px solid var(--bv-border);
    border-radius: 24px;
    box-shadow: 0 24px 70px rgba(0, 0, 0, 0.45);
}

/* Left branding section */
.panel .side {
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 55px 48px;
    overflow: hidden;
    color: var(--bv-text);
    background:
        radial-gradient(circle at 20% 20%,
            rgba(245, 130, 32, 0.22),
            transparent 35%),
        linear-gradient(145deg,
            #18120d 0%,
            #0b0907 55%,
            #050403 100%);
}

.panel .side::before {
    content: "";
    position: absolute;
    width: 280px;
    height: 280px;
    top: -120px;
    right: -100px;
    border-radius: 50%;
    border: 1px solid rgba(245, 130, 32, 0.22);
    box-shadow:
        0 0 0 35px rgba(245, 130, 32, 0.035),
        0 0 0 70px rgba(245, 130, 32, 0.025);
}

.panel .side::after {
    content: "";
    position: absolute;
    left: 48px;
    bottom: 55px;
    width: 58px;
    height: 4px;
    border-radius: 10px;
    background: var(--bv-orange);
}

.panel .side>* {
    position: relative;
    z-index: 2;
}

.panel .side svg {
    width: 82px;
    height: 82px;
    margin-bottom: 24px;
    color: var(--bv-orange);
    fill: currentColor;
}

.panel .brand h1 {
    margin: 0;
    color: var(--bv-text);
    font-size: clamp(32px, 4vw, 46px);
    font-weight: 800;
    line-height: 1.05;
    letter-spacing: -1.5px;
}

.panel .brand p {
    margin: 10px 0 0;
    color: var(--bv-orange);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 1.4px;
    text-transform: uppercase;
}

.panel .tagline {
    max-width: 330px;
    margin-top: 34px;
    color: var(--bv-muted);
    font-size: 15px;
    line-height: 1.75;
}

/* Form section */
.panel .form-side {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 55px 48px;
    background:
        linear-gradient(180deg,
            rgba(255, 255, 255, 0.015),
            transparent),
        var(--bv-bg);
}

#sbol-login-box {
    width: 100%;
    max-width: 360px !important;
}

#sbol-login-box::before {
    content: "Login to continue";
    display: block;
    margin-bottom: 8px;
    color: var(--bv-text);
    font-size: 28px;
    font-weight: 750;
    line-height: 1.2;
}

#sbol-login-box::after {
    content: "Enter your mobile number to access your workout dashboard.";
    display: block;
    margin-top: 22px;
    color: var(--bv-muted);
    font-size: 12px;
    line-height: 1.6;
    text-align: center;
}

#sbol-step-phone::before {
    content: "A secure OTP will be sent to your number.";
    display: block;
    margin-bottom: 28px;
    color: var(--bv-muted);
    font-size: 14px;
    line-height: 1.6;
}

#sbol-step-otp::before {
    content: "Enter the 6-digit OTP sent to your mobile number.";
    display: block;
    margin-bottom: 24px;
    color: var(--bv-muted);
    font-size: 14px;
    line-height: 1.6;
}

#sbol-login-box p {
    margin: 0 0 18px;
}

#sbol-login-box label {
    display: block;
    color: #d8d3cc;
    font-size: 13px;
    font-weight: 600;
    line-height: 1.6;
}

#sbol-login-box input[type="tel"],
#sbol-login-box input[type="text"] {
    width: 100% !important;
    height: 52px;
    margin-top: 8px;
    padding: 0 16px !important;
    color: var(--bv-text);
    font-family: inherit;
    font-size: 15px;
    font-weight: 500;
    outline: none;
    background: var(--bv-surface-light);
    border: 1px solid var(--bv-border);
    border-radius: 12px;
    box-sizing: border-box;
    transition:
        border-color 0.25s ease,
        box-shadow 0.25s ease,
        background-color 0.25s ease;
}

#sbol-login-box input::placeholder {
    color: #726c65;
}

#sbol-login-box input:hover {
    border-color: rgba(245, 130, 32, 0.35);
}

#sbol-login-box input:focus {
    background: #211c17;
    border-color: var(--bv-orange);
    box-shadow: 0 0 0 4px var(--bv-orange-soft);
}

/* OTP field */
#sbol-otp {
    text-align: center;
    font-size: 21px !important;
    font-weight: 700 !important;
    letter-spacing: 8px;
}

/* Buttons */
#sbol-send-otp,
#sbol-verify-otp {
    width: 100%;
    min-height: 52px;
    padding: 13px 20px;
    color: #ffffff;
    font-family: inherit;
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    border: 0;
    border-radius: 12px;
    background: linear-gradient(135deg,
            var(--bv-orange),
            var(--bv-orange-dark));
    box-shadow: 0 10px 25px rgba(245, 130, 32, 0.22);
    transition:
        transform 0.2s ease,
        box-shadow 0.2s ease,
        opacity 0.2s ease;
}

#sbol-send-otp:hover,
#sbol-verify-otp:hover {
    transform: translateY(-2px);
    box-shadow: 0 14px 30px rgba(245, 130, 32, 0.32);
}

#sbol-send-otp:active,
#sbol-verify-otp:active {
    transform: translateY(0);
}

#sbol-send-otp:disabled,
#sbol-verify-otp:disabled {
    cursor: not-allowed;
    opacity: 0.55;
    transform: none;
}

/* Google reCAPTCHA */
#recaptcha-container {
    width: 100%;
    margin: 4px 0 18px;
    overflow: hidden;
    border-radius: 10px;
}

#recaptcha-container>div {
    max-width: 100%;
}

/* Loader */
#sbol-loader {
    padding: 20px 0;
}

.sbol-spinner {
    width: 38px;
    height: 38px;
    margin: 0 auto 12px;
    border: 3px solid rgba(255, 255, 255, 0.1);
    border-top-color: var(--bv-orange);
    border-radius: 50%;
    animation: sbolSpin 0.8s linear infinite;
}

#sbol-loader-text {
    margin: 0 !important;
    color: var(--bv-muted);
    font-size: 13px;
}

@keyframes sbolSpin {
    to {
        transform: rotate(360deg);
    }
}

/* Message */
#sbol-message {
    min-height: 22px;
    margin: 14px 0 0 !important;
    padding: 0;
    color: var(--bv-danger);
    font-size: 13px;
    font-weight: 500;
    line-height: 1.6;
    text-align: center;
}

#sbol-message.success {
    color: var(--bv-success);
}

#sbol-message.error {
    color: var(--bv-danger);
}

/* Mobile layout */
@media (max-width: 768px) {
    .panel {
        width: min(100% - 24px, 520px);
        min-height: auto;
        grid-template-columns: 1fr;
        margin: 20px auto;
        border-radius: 20px;
    }

    .panel .side {
        min-height: 220px;
        padding: 36px 28px;
    }

    .panel .side svg {
        width: 58px;
        height: 58px;
        margin-bottom: 16px;
    }

    .panel .brand h1 {
        font-size: 32px;
    }

    .panel .tagline {
        margin-top: 20px;
        font-size: 13px;
    }

    .panel .side::after {
        left: 28px;
        bottom: 28px;
    }

    .panel .form-side {
        padding: 38px 24px;
    }

    #sbol-login-box::before {
        font-size: 24px;
    }
}

@media (max-width: 420px) {
    .panel {
        width: calc(100% - 16px);
        margin: 8px auto;
        border-radius: 16px;
    }

    .panel .side {
        padding: 30px 22px;
    }

    .panel .form-side {
        padding: 32px 18px;
    }

    #sbol-login-box input[type="tel"],
    #sbol-login-box input[type="text"],
    #sbol-send-otp,
    #sbol-verify-otp {
        min-height: 50px;
    }
}