/* Variables */
:root {
    --color-primary: #7b3fff; /* Violet */
    --color-background: #ffffff; /* White */
    --color-text: #000000; /* Black */
    --transition-speed: 0.5s;
}

/* Base & Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Poppins', sans-serif; /* Default for English */
    background-color: var(--color-background);
    color: var(--color-text);
    transition: background-color var(--transition-speed), color var(--transition-speed);
    direction: rtl; /* Default direction for Persian */
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

/* Loading Screen (Initial Splash) */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--color-background);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 1;
    transition: opacity var(--transition-speed) ease-in-out;
}

.brand-logo-text {
    font-size: 4rem;
    font-weight: 600;
    color: var(--color-primary);
    position: relative;
    display: inline-block;
}

/* Fading In Animation (for logo) */
.brand-logo-text[data-text="Rain"] {
    animation: fadeInTop 1.5s ease-out forwards;
    opacity: 0;
}

@keyframes fadeInTop {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Main Content (Hidden initially, shown after loading) */
.main-content {
    opacity: 0;
    transform: scale(0.95);
    transition: opacity var(--transition-speed) ease-in-out, transform var(--transition-speed) ease-in-out;
}

.main-content.visible {
    opacity: 1;
    transform: scale(1);
}

/* Header */
header {
    padding: 15px 0;
    border-bottom: 1px solid #eee;
}

.container-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

.brand-name {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-text);
    transition: color var(--transition-speed);
}

.lang-btn {
    background: none;
    border: 1px solid var(--color-text);
    color: var(--color-text);
    padding: 8px 15px;
    cursor: pointer;
    border-radius: 5px;
    font-size: 0.9rem;
    transition: all var(--transition-speed) ease;
}

.lang-btn:hover {
    background-color: var(--color-text);
    color: var(--color-background);
}

/* Hero Section */
.hero-section {
    min-height: 70vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 60px 0;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--color-primary);
    opacity: 0; /* Controlled by JS animation */
}

.hero-subtitle {
    font-size: 1.4rem;
    font-weight: 300;
    margin-bottom: 40px;
    opacity: 0; /* Controlled by JS animation */
}

.cta-buttons {
    display: flex;
    gap: 20px;
    opacity: 0; /* Controlled by JS animation */
}

.cta-btn {
    padding: 12px 30px;
    text-decoration: none;
    border-radius: 30px;
    font-weight: 600;
    transition: all 0.3s ease;
    font-size: 1.1rem;
}

.primary-btn {
    background-color: var(--color-primary);
    color: var(--color-background);
    border: 2px solid var(--color-primary);
}

.primary-btn:hover {
    background-color: #6a31d6;
    border-color: #6a31d6;
}

.secondary-btn {
    background-color: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

.secondary-btn:hover {
    background-color: var(--color-primary);
    color: var(--color-background);
}


/* Footer */
footer {
    padding: 20px 0;
    text-align: center;
    border-top: 1px solid #eee;
}

footer p {
    font-size: 0.9rem;
    color: #777;
}

/* Animations Class Definitions (Controlled by JS) */
.fade-in {
    animation: fadeIn 1s ease-out forwards;
    opacity: 0;
}
.fade-in-2 { animation: fadeIn 1s ease-out 0.5s forwards; opacity: 0; }
.fade-in-3 { animation: fadeIn 1s ease-out 1s forwards; opacity: 0; }
.fade-in-4 { animation: fadeIn 1s ease-out 1.5s forwards; opacity: 0; }

@keyframes fadeIn {
    from { opacity: 0; transform: scale(0.9) blur(5px); }
    to { opacity: 1; transform: scale(1) blur(0); }
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }
    .hero-subtitle {
        font-size: 1.1rem;
    }
    .cta-buttons {
        flex-direction: column;
        gap: 15px;
    }
    .lang-btn {
        padding: 6px 12px;
    }
}

/* RTL adjustments for English */
.lang-en body {
    direction: ltr;
}
.lang-en .container-header {
    flex-direction: row-reverse;
}
.lang-en .cta-buttons {
    flex-direction: row;
}