/* --- VARIABLES (System Theme) --- */
:root {
    --primary: #0056b3;
    --primary-dark: #004494;
    --bg-gradient: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    --card-bg: rgba(255, 255, 255, 0.9);
    --text-main: #333;
    --text-light: #666;
    --input-bg: #f9f9f9;
    --border: #e1e1e1;
    --shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.15);
}

@media (prefers-color-scheme: dark) {
    :root {
        --primary: #339af0;
        --primary-dark: #1c7ed6;
        --bg-gradient: linear-gradient(135deg, #0f2027 0%, #203a43 50%, #2c5364 100%);
        --card-bg: rgba(30, 30, 30, 0.85);
        --text-main: #fff;
        --text-light: #aaa;
        --input-bg: #2a2a2a;
        --border: #444;
        --shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.5);
    }
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', sans-serif;
}

body {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-gradient);
    background-size: cover;
}

/* Back Button */
.back-home {
    position: absolute;
    top: 20px;
    left: 20px;
    color: var(--text-main);
    font-weight: 600;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 15px;
    background: var(--card-bg);
    border-radius: 30px;
    -webkit-backdrop-filter: blur(5px);
    backdrop-filter: blur(5px);
    transition: 0.3s;
}

.back-home:hover {
    transform: translateX(-5px);
    color: var(--primary);
}

/* Login Card */
.login-card {
    width: 90%;
    max-width: 100%;
    -webkit-backdrop-filter: blur(5px);
    backdrop-filter: blur(8px);
    background: var(--card-bg);
    /* Glassmorphism */
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 20px;
    padding: 40px 30px;
    box-shadow: var(--shadow);
    margin: 20px;
    animation: slideUp 0.6s ease-out;
}

.brand-header {
    text-align: center;
    margin-bottom: 30px;
}

.login-logo {
    width: 60px;
    height: 60px;
    margin-bottom: 10px;
}

.brand-header h2 {
    color: var(--text-main);
    font-size: 1.8rem;
}

.brand-header p {
    color: var(--text-light);
    font-size: 0.95rem;
}

/* Input Fields (Floating Label) */
.input-group {
    position: relative;
    margin-bottom: 20px;
}

.input-group input {
    width: 100%;
    padding: 12px 40px 12px 45px;
    background: var(--input-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--text-main);
    font-size: 1rem;
    outline: none;
    transition: 0.3s;
}

.input-group label {
    position: absolute;
    left: 45px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-light);
    pointer-events: none;
    transition: 0.3s;
    font-size: 0.95rem;
}

/* Focus State & Valid State (Label moves up) */
.input-group input:focus,
.input-group input:not(:placeholder-shown) {
    border-color: var(--primary);
    background: transparent;
}

.input-group input:focus~label,
.input-group input:not(:placeholder-shown)~label {
    top: 0px;
    left: 15px;
    font-size: 0.75rem;
    padding: 0 5px;
    background: var(--card-bg);
    color: var(--primary);
}

.input-icon {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-light);
}

.toggle-pass {
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-light);
    cursor: pointer;
}

/* Buttons & Actions */
.form-actions {
    display: flex;
    justify-content: flex-end;
    margin-bottom: 25px;
}

.forgot-pass {
    color: var(--primary);
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: none;
}

.btn-login {
    width: 100%;
    padding: 14px;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    transition: 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.btn-login:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

/* App Prompt */
.app-prompt {
    text-align: center;
    margin-top: 25px;
    font-size: 0.9rem;
    color: var(--text-light);
}

.app-prompt a {
    color: var(--primary);
    font-weight: bold;
    text-decoration: none;
}

.divider {
    margin: 15px 0;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    opacity: 0.6;
}

.btn-app {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border: 1px solid var(--border);
    border-radius: 50px;
    color: var(--text-main);
    font-weight: 600;
    transition: 0.3s;
}

.btn-app:hover {
    background: var(--input-bg);
    border-color: var(--primary);
}

/* Animation */
@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}