/* ==========================================================================
   Gradient Text
   ========================================================================== */
.gradient-text {
    background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent));
    background-size: 200% auto;
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    animation: textGradient 5s linear infinite;
}

@keyframes textGradient {
    0% { background-position: 0% center; }
    100% { background-position: 200% center; }
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
    display: inline-block;
    padding: 0.8rem 1.8rem;
    font-weight: 600;
    font-size: 1rem;
    border-radius: 50px;
    text-align: center;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    box-shadow: 0 4px 20px rgba(0, 102, 204, 0.4);
    position: relative;
    overflow: hidden;
    z-index: 1;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--secondary), var(--primary));
    transition: left 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    z-index: -1;
}

.btn-primary:hover {
    filter: brightness(1.1);
    box-shadow: 0 8px 25px rgba(0, 102, 204, 0.4), var(--glow-primary);
}

.btn-primary:hover::before {
    left: 0;
}

.btn-outline {
    background-color: transparent;
    border: 2px solid rgba(255, 255, 255, 0.8);
    color: #fff;
    position: relative;
    overflow: hidden;
    z-index: 1;
    transition: border-color 0.3s ease, color 0.3s ease, transform 0.3s ease;
}

.btn-outline::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(100%);
    transition: transform 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    z-index: -1;
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 1);
}

.btn-outline:hover::before {
    transform: translateY(0);
}

.btn-lg {
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
}