/* ===== Root Theme ===== */
:root {
    --primary-color: #207bff;
    --primary-hover: #0d5ed7;
    --accent-glow: rgba(32, 123, 255, 0.25);

    --bg-1: #1e3c72;
    --bg-2: #2a5298;

    --card-bg: rgba(255, 255, 255, 0.88);
    --text-dark: #1f2937;
    --text-muted: #6b7280;

    --border-radius: 14px;
}

/* ===== Animated Background ===== */
body {
    margin: 0;
    font-family: 'Roboto', 'Lato', sans-serif;
    min-height: 100vh;
    background: whitesmoke;
    background-size: 400% 400%;
    animation: gradientMove 12s ease infinite;
}

/* subtle animated gradient */
@keyframes gradientMove {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* ===== Floating Blur Circles (Premium Look) ===== */
body::before,
body::after {
    content: "";
    position: absolute;
    width: 300px;
    height: 300px;
    background: rgba(255,255,255,0.08);
    filter: blur(80px);
    border-radius: 50%;
    z-index: 0;
}

body::before {
    top: -80px;
    left: -80px;
}

body::after {
    bottom: -80px;
    right: -80px;
}

/* ===== Wrapper ===== */
.login-wrapper {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ===== Card ===== */
.login-card {
    border: none;
    border-radius: var(--border-radius);
    background: var(--card-bg);
    backdrop-filter: blur(18px);
    box-shadow: 0 10px 40px rgba(0,0,0,0.15);
    transition: all 0.35s ease;
}

.login-card:hover {
    transform: translateY(-6px) scale(1.01);
    box-shadow: 0 25px 60px rgba(0,0,0,0.25);
}

/* ===== Header ===== */
.login-title {
    font-weight: 700;
    color: var(--text-dark);
    letter-spacing: 0.5px;
}

.login-subtitle {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* ===== Inputs ===== */
.login-input {
    border-radius: 10px;
    border: 1px solid #e5e7eb;
    transition: all 0.25s ease;
    background: #fff;
}

/* glow effect */
.login-input:focus {
    border-color: var(--primary-color);
    box-shadow:
        0 0 0 3px var(--accent-glow),
        0 4px 12px rgba(0,0,0,0.05);
    transform: translateY(-1px);
}

/* Floating label */
.form-floating > label {
    color: #9ca3af;
}

/* ===== Password Toggle ===== */
.password-toggle {
    position: absolute;
    top: 50%;
    right: 12px;
    transform: translateY(-50%);
    border: none;
    background: transparent;
    cursor: pointer;
    font-size: 1.2rem;
    transition: transform 0.2s ease;
}

.password-toggle:hover {
    transform: translateY(-50%) scale(1.15);
}

/* ===== Button ===== */
.login-btn {
    background: linear-gradient(135deg, #207bff, #4facfe);
    border: none;
    border-radius: 10px;
    padding: 12px;
    font-weight: 600;
    color: #fff;
    letter-spacing: 0.3px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

/* shine animation */
.login-btn::after {
    content: "";
    position: absolute;
    width: 120%;
    height: 100%;
    top: 0;
    left: -120%;
    background: linear-gradient(120deg, transparent, rgba(255,255,255,0.4), transparent);
    transition: all 0.6s;
}

.login-btn:hover::after {
    left: 120%;
}

.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(32,123,255,0.35);
}

/* ===== Spinner ===== */
.btn-loading .spinner {
    width: 20px;
    height: 20px;
    border: 3px solid #fff;
    border-top: 3px solid transparent;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
    margin: auto;
}

@keyframes spin {
    100% { transform: rotate(360deg); }
}

/* ===== Alerts ===== */
.alert {
    border-radius: 10px;
    font-size: 0.9rem;
    backdrop-filter: blur(5px);
}

/* ===== Footer ===== */
.login-footer {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.login-footer a {
    color: var(--primary-color);
    font-weight: 500;
}

.login-footer a:hover {
    text-decoration: underline;
}

/* ===== Extra Small Devices (Phones <576px) ===== */
@media (max-width: 575px) {

    .login-card {
        margin: 10px;
        border-radius: 10px;
    }

    .login-card-body {
        padding: 1.2rem !important;
    }

    .login-title {
        font-size: 1.4rem;
    }

    .login-subtitle {
        font-size: 0.85rem;
    }

    .login-btn {
        padding: 10px;
        font-size: 0.9rem;
    }
}

/* ===== Small Devices (≥576px and <768px) ===== */
@media (min-width: 576px) and (max-width: 767px) {

    .login-card {
        max-width: 420px;
        margin: auto;
    }

    .login-title {
        font-size: 1.6rem;
    }
}

/* ===== Medium Devices (Tablets ≥768px and <992px) ===== */
@media (min-width: 768px) and (max-width: 991px) {

    .login-card {
        max-width: 460px;
        margin: auto;
    }

    .login-title {
        font-size: 1.8rem;
    }

    .login-card-body {
        padding: 2rem !important;
    }
}

/* ===== Large Devices (Laptops ≥992px and <1200px) ===== */
@media (min-width: 992px) and (max-width: 1199px) {

    .login-card {
        max-width: 480px;
    }

    .login-title {
        font-size: 2rem;
    }
}

/* ===== Extra Large Devices (≥1200px) ===== */
@media (min-width: 1200px) {

    .login-card {
        max-width: 520px;
    }

    .login-title {
        font-size: 2.2rem;
    }
}

/* ===== Ultra Wide Screens (≥1600px) ===== */
@media (min-width: 1600px) {

    .login-card {
        max-width: 560px;
        transform: scale(1.05);
    }

    .login-wrapper {
        padding: 40px;
    }
}