:root {
    --primary: #D4AF37;
    /* Gold */
    --primary-hover: #b39129;
    --bg-dark: #0f172a;
    /* Slate 900 for dark elegance */
    --text-white: #f8fafc;
    --text-muted: #cbd5e1;
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --font-heading: 'Playfair Display', serif;
    --font-body: 'Inter', sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-dark);
    color: var(--text-white);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    overflow: hidden;
}

/* Background image with overlay */
.background-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    /* Premium Kaundi background representing emotion and exclusivity */
    background: url('kaundi_bg_v3.png') center/cover no-repeat;
    z-index: -2;
}

.background-overlay::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    /* Curangkan kepekatan warna hitam ni supaya gambar origin lebih menyerlah */
    background: linear-gradient(135deg, rgba(15,23,42,0.25) 0%, rgba(15,23,42,0.1) 100%);
    z-index: -1;
}

/* Glassmorphism Container */
.glass-container {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 3rem;
    width: 100%;
    max-width: 450px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    display: flex;
    flex-direction: column;
    align-items: center;
    animation: slideUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* Logo Area */
.logo-area {
    text-align: center;
    margin-bottom: 2.5rem;
}

.logo-area h1 {
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 700;
    letter-spacing: -1px;
    margin-bottom: 0.2rem;
    text-shadow: 0 2px 10px rgba(0,0,0,0.8);
}

.logo-area h1 span {
    color: var(--primary);
}

.logo-area p {
    font-size: 0.85rem;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--text-white);
    font-weight: 500;
    text-shadow: 0 1px 6px rgba(0,0,0,0.9);
}

/* Forms */
.form-wrapper {
    width: 100%;
    position: relative;
    min-height: 350px;
    /* To maintain height during transition */
}

.auth-form {
    width: 100%;
    position: absolute;
    top: 0;
    left: 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.4s ease;
}

.auth-form.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    position: relative;
}

.auth-form h2 {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.subtitle {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 2rem;
}

/* Inputs */
.input-group {
    position: relative;
    margin-bottom: 1.2rem;
}

.input-group i {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    width: 18px;
    height: 18px;
}

.input-group input {
    width: 100%;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 0.9rem 1rem 0.9rem 3rem;
    border-radius: 12px;
    color: var(--text-white);
    font-family: var(--font-body);
    font-size: 0.95rem;
    transition: all 0.3s ease;
}

.input-group input:focus {
    outline: none;
    border-color: var(--primary);
    background: rgba(0, 0, 0, 0.4);
    box-shadow: 0 0 0 4px rgba(212, 175, 55, 0.1);
}

.input-group input::placeholder {
    color: rgba(255, 255, 255, 0.4);
}

/* Butang mata tunjuk/sembunyi kata laluan */
.toggle-pwd {
    position: absolute;
    right: 0.8rem;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    cursor: pointer;
    color: var(--primary);
    padding: 0 0.4rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.2s, opacity 0.2s;
    opacity: 0.8;
    z-index: 2;
}
.toggle-pwd:hover { opacity: 1; color: #fff; }
.toggle-pwd svg { width: 22px; height: 22px; stroke-width: 2; margin-top: 25px; }

/* Bagi ruang kanan untuk input yang ada butang mata */
.input-group:has(.toggle-pwd) input {
    padding-right: 3rem;
}

/* Form Options */
.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    margin-bottom: 2rem;
}

.remember-me {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-muted);
    cursor: pointer;
}

.forgot-pwd {
    color: var(--text-white);
    text-decoration: underline;
    font-weight: 500;
    transition: all 0.3s;
    text-shadow: 0 1px 4px rgba(0,0,0,0.8);
}

.forgot-pwd:hover {
    color: var(--primary);
    text-shadow: 0 2px 8px rgba(0,0,0,0.9);
}

/* Buttons */
.primary-btn {
    width: 100%;
    background: var(--primary);
    color: #fff;
    border: none;
    padding: 0.9rem;
    border-radius: 12px;
    font-weight: 600;
    font-family: var(--font-body);
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(212, 175, 55, 0.3);
}

.primary-btn:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(212, 175, 55, 0.4);
}

/* Switch Forms Text */
.switch-form {
    text-align: center;
    margin-top: 1.5rem;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.switch-form a {
    color: var(--text-white);
    text-decoration: underline;
    font-weight: 600;
    margin-left: 0.3rem;
    text-shadow: 0 1px 4px rgba(0,0,0,0.8);
}

.switch-form a:hover {
    color: var(--primary);
}

/* Animations */
@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }

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

/* Custom Premium Alert */
.premium-alert {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s ease;
}

.premium-alert.show {
    opacity: 1;
    visibility: visible;
}

.premium-alert .glass-container {
    max-width: 400px;
    text-align: center;
    transform: scale(0.9) translateY(20px);
    transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
    padding: 2.5rem;
}

.premium-alert.show .glass-container {
    transform: scale(1) translateY(0);
}

.alert-message {
    font-size: 1.05rem;
    margin-bottom: 2rem;
    color: var(--text-white);
    line-height: 1.6;
    letter-spacing: 0.5px;
}

.alert-close {
    width: 70%;
    margin: 0 auto;
}

/* Floating Music Player */
.music-player {
    position: fixed;
    bottom: 30px;
    left: 30px;
    z-index: 999;
    cursor: pointer;
}

.music-disc {
    width: 55px;
    height: 55px;
    background: rgba(15, 23, 42, 0.4);
    border: 1px solid rgba(212, 175, 55, 0.3);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    color: var(--primary);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    box-shadow: 0 4px 15px rgba(0,0,0,0.5);
    transition: all 0.3s ease;
}

.music-disc i {
    width: 22px;
    height: 22px;
}

.music-disc:hover {
    transform: scale(1.1);
    border-color: var(--primary);
    box-shadow: 0 4px 20px rgba(212, 175, 55, 0.4);
}

.music-disc.playing {
    animation: spinDisc 4s linear infinite;
    background: rgba(212, 175, 55, 0.15);
}

@keyframes spinDisc {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}