/* Buttons & Interactive Components */
.btn {
    display: inline-block;
    padding: 0.6rem 1.5rem;
    border-radius: 6px;
    font-weight: 600;
    text-align: center;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.1);
    transform: translateX(-100%) rotate(45deg);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: -1;
}

.btn:hover::before {
    transform: translateX(0) rotate(45deg);
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--white);
    border-color: var(--primary-color);
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
    color: var(--white);
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(52, 152, 219, 0.3);
}

.btn-outline-primary {
    background-color: transparent;
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-outline-primary:hover {
    background-color: var(--primary-color);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(52, 152, 219, 0.2);
}

.btn-dark {
    background-color: var(--dark-color);
    color: var(--white);
    border-color: var(--dark-color);
}

.btn-dark:hover {
    background-color: var(--dark-gray);
    border-color: var(--dark-gray);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(44, 62, 80, 0.2);
}

.btn-outline-light {
    background-color: transparent;
    color: var(--white);
    border-color: var(--white);
}

.btn-outline-light:hover {
    background-color: var(--white);
    color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 255, 255, 0.2);
}

.btn-sm {
    padding: 0.4rem 1rem;
    font-size: 0.875rem;
    border-radius: 4px;
}

.btn-lg {
    padding: 0.8rem 2rem;
    font-size: 1.1rem;
    border-radius: 8px;
}

.btn-close {
    width: 2rem;
    height: 2rem;
    padding: 0.25rem;
    background: transparent url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23000'%3e%3cpath d='M.293.293a1 1 0 011.414 0L8 6.586 14.293.293a1 1 0 111.414 1.414L9.414 8l6.293 6.293a1 1 0 01-1.414 1.414L8 9.414l-6.293 6.293a1 1 0 01-1.414-1.414L6.586 8 .293 1.707a1 1 0 010-1.414z'/%3e%3c/svg%3e") center/1em auto no-repeat;
    border: 0;
    border-radius: 0.25rem;
    opacity: 0.5;
    transition: opacity 0.15s ease-in-out;
}

.btn-close:hover {
    opacity: 0.75;
    background-color: rgba(0, 0, 0, 0.1);
}



/* Modern Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.95);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px) scale(0.8);
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    z-index: 1001;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.back-to-top::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-color), #4a90e2);
    border-radius: 50%;
    opacity: 0;
    transform: scale(0);
    transition: all 0.3s ease;
}

.back-to-top:hover::before {
    opacity: 1;
    transform: scale(1);
}

.arrow-icon {
    width: 24px;
    height: 24px;
    color: var(--primary-color);
    transition: all 0.3s ease;
    position: relative;
    z-index: 2;
}

.back-to-top:hover .arrow-icon {
    color: white;
    transform: translateY(-2px);
}

.progress-ring {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.progress-svg {
    width: 100%;
    height: 100%;
}

.progress-circle {
    fill: none;
    stroke: var(--primary-color);
    stroke-linecap: round;
    stroke-dasharray: 163.36;
    stroke-dashoffset: 163.36;
    opacity: 0.3;
    transition: stroke-dashoffset 0.1s ease;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}

.back-to-top:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.2);
}

.back-to-top:active {
    transform: translateY(-1px) scale(0.98);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.8);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes arrowBounce {
    0%, 100% {
        transform: translateY(0);
    }
    25% {
        transform: translateY(-8px);
    }
    50% {
        transform: translateY(-4px);
    }
    75% {
        transform: translateY(-6px);
    }
}

.back-to-top.show {
    animation: fadeInUp 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.back-to-top.clicked .arrow-icon {
    animation: arrowBounce 0.6s ease-out;
}

/* Dark mode support */
.dark-mode .back-to-top {
    background: rgba(44, 62, 80, 0.95);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.dark-mode .arrow-icon {
    color: #64b5f6;
}

.dark-mode .progress-circle {
    stroke: #64b5f6;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .back-to-top {
        bottom: 25px;
        right: 25px;
        width: 55px;
        height: 55px;
    }
    
    .arrow-icon {
        width: 22px;
        height: 22px;
    }
}

@media (max-width: 480px) {
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 50px;
        height: 50px;
    }
    
    .arrow-icon {
        width: 20px;
        height: 20px;
    }
}

/* Modal Styles */
.modal-content {
    border: none;
    border-radius: 8px;
    overflow: hidden;
}

.modal-header {
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    padding: 1.5rem;
}

.modal-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--dark-color);
}

.modal-body {
    padding: 1.5rem;
    height: 80vh;
    overflow-y: auto;
}

.cv-iframe {
    width: 100%;
    height: 500px;
    border: none;
}