:root {
    --primary-color: #1a2a3a; /* Deep Navy for elegance */
    --gold: #D4AF37;
    --gold-gradient: linear-gradient(45deg, #BF953F, #FCF6BA, #B38728, #FBF5B7, #AA771C);
    --silver: #C0C0C0;
    --background-color: #0f1620; /* Dark premium background */
    --text-primary: #ffffff;
    --text-secondary: #a0aec0;
    --card-bg: rgba(26, 32, 44, 0.95);
    --borderRadius: 12px;
    --transition-smooth: all 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

body {
    font-family: 'Manrope', 'Arial', sans-serif;
    background-color: var(--background-color);
    background-image: 
        radial-gradient(circle at 20% 30%, rgba(212, 175, 55, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(192, 192, 192, 0.05) 0%, transparent 50%);
    color: var(--text-primary);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    overflow-x: hidden;
}

.container {
    width: 100%;
    max-width: 800px;
    padding: 40px 20px;
    perspective: 2000px;
}

/* --- Glitz & Glamour Envelope --- */
.envelope-wrapper {
    position: relative;
    width: 600px; /* Increased from 500px */
    height: 420px; /* Increased from 340px */
    margin: 120px auto 60px; /* Increased top margin from 60px to 120px */
    background: #fff;
    box-shadow: 0 30px 60px rgba(0,0,0,0.5);
    cursor: pointer;
    transition: var(--transition-smooth);
    transform-style: preserve-3d;
    border: 1px solid rgba(212, 175, 55, 0.3);
}

.envelope-wrapper:hover {
    transform: translateY(-15px) rotateX(5deg);
}

.envelope-flap {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--primary-color);
    clip-path: polygon(0 0, 100% 0, 50% 50%);
    z-index: 3;
    transform-origin: top;
    transition: var(--transition-smooth);
    border-bottom: 2px solid var(--gold);
}

.envelope-wrapper.open .envelope-flap {
    transform: rotateX(180deg);
    z-index: 1;
    border-bottom: none;
}

.envelope-body {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--primary-color);
    clip-path: polygon(0 0, 0 100%, 100% 100%, 100% 0, 50% 50%);
    z-index: 2;
    box-shadow: inset 0 0 50px rgba(0,0,0,0.3);
}

.letter {
    position: absolute;
    bottom: 15px;
    left: 4%;
    width: 92%;
    height: 390px; /* Increased from 310px */
    background: #fff;
    color: #1a2a3a;
    padding: 40px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
    z-index: 1;
    transition: var(--transition-smooth);
    opacity: 0;
    transform: translateY(20px);
    text-align: center;
    border: 4px double var(--gold);
}

.envelope-wrapper.open .letter {
    transform: translateY(-80px); /* Adjusted pull-out height for larger envelope */
    opacity: 1;
    z-index: 4;
}

.celebration-text {
    font-size: 1.2rem;
    margin: 15px 0;
    color: var(--primary-color);
    font-weight: 600;
}

.gold-accent {
    background: var(--gold-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 2px;
}

/* --- Confetti Effect --- */
#confetti-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 100;
}

/* --- RSVP Form v2 --- */
.rsvp-section {
    margin-top: 100px;
    background: var(--card-bg);
    padding: 50px;
    border-radius: var(--borderRadius);
    box-shadow: 0 20px 50px rgba(0,0,0,0.4);
    border: 1px solid rgba(212, 175, 55, 0.2);
    backdrop-filter: blur(15px);
    opacity: 0;
    transform: translateY(40px);
    transition: var(--transition-smooth);
    text-align: left; /* Improved alignment */
}

.rsvp-section.visible {
    opacity: 1;
    transform: translateY(0);
}

h1 {
    font-family: 'Manrope', sans-serif;
    background: var(--gold-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    font-size: 32px;
    margin-bottom: 30px;
    text-align: center;
    letter-spacing: 1px;
}

.form-group {
    display: flex;
    flex-direction: column;
    margin-bottom: 25px;
}

.form-group label {
    color: var(--gold);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin-bottom: 10px;
    font-weight: 700;
}

input, select, textarea {
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(212, 175, 55, 0.3);
    color: #fff;
    padding: 15px;
    width: 100%;
    border-radius: 6px;
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition-smooth);
}

input:focus, select:focus, textarea:focus {
    border-color: var(--gold);
    background: rgba(255,255,255,0.1);
    outline: none;
    box-shadow: 0 0 10px rgba(212, 175, 55, 0.2);
}

button {
    width: 100%;
    background: var(--gold-gradient);
    color: #000;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 2px;
    padding: 24px; /* Increased from 20px */
    border: none;
    border-radius: 8px;
    cursor: pointer;
    box-shadow: 0 10px 20px rgba(212, 175, 55, 0.2);
    transition: var(--transition-smooth);
    margin-top: 10px;
    font-size: 1.1rem; /* Added font-size */
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 30px rgba(212, 175, 55, 0.4);
    filter: brightness(1.1);
}

/* --- Toast Notification --- */
.toast {
    position: fixed;
    top: 40px;
    left: 50%;
    transform: translateX(-50%) translateY(-150px);
    background: var(--card-bg);
    border: 2px solid var(--gold); /* Thicker border */
    color: var(--text-primary);
    padding: 24px 40px; /* Increased padding */
    border-radius: 16px; /* Less rounded for more presence */
    z-index: 1000;
    font-weight: 700;
    font-size: 1.2rem; /* Increased font-size */
    box-shadow: 0 25px 60px rgba(0,0,0,0.6);
    transition: all 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    opacity: 0;
    display: flex;
    flex-direction: column; /* Allow for link below text */
    align-items: center;
    gap: 15px;
    backdrop-filter: blur(25px);
    width: max-content;
    max-width: 90%;
    text-align: center;
}

.toast.visible {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

.toast a {
    color: var(--gold);
    text-decoration: underline;
    font-size: 0.95rem;
    cursor: pointer;
}

.toast.success {
    border-bottom: 6px solid #48bb78; /* Bottom bar for success */
}

.toast.error {
    border-bottom: 6px solid #f56565; /* Bottom bar for error */
}

/* Responsive adjustments */
@media (max-width: 600px) {
    .envelope-wrapper {
        width: 340px;
        height: 230px;
    }
    .letter {
        height: 210px;
        padding: 20px;
    }
    .envelope-wrapper.open .letter {
        transform: translateY(-140px);
    }
}