/**
 * Preloader Styles
 * Sayfa yükleme ve geçiş animasyonları
 */

/* Preloader Container */
.preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(32, 69, 98, 0.98) 0%, rgba(38, 158, 173, 0.95) 100%);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    opacity: 1;
    visibility: visible;
    transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1), visibility 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    overflow: hidden;
}

.preloader::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    animation: rotateBg 20s linear infinite;
}

.preloader::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 30%, rgba(38, 158, 173, 0.2) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(32, 69, 98, 0.2) 0%, transparent 50%);
    animation: pulseBg 4s ease-in-out infinite;
}

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

@keyframes pulseBg {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
}

.preloader.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

/* Preloader Content */
.preloader-content {
    text-align: center;
    position: relative;
}

/* Preloader Logo */
.preloader-logo {
    margin-bottom: 2.5rem;
    position: relative;
    z-index: 1;
    animation: logoSlideIn 1s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

.preloader-logo img {
    max-width: 220px;
    height: auto;
    filter: drop-shadow(0 8px 24px rgba(255, 255, 255, 0.4));
    animation: logoFloat 3s ease-in-out infinite;
    position: relative;
}

.preloader-logo::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.15) 0%, transparent 70%);
    border-radius: 50%;
    animation: logoGlow 2s ease-in-out infinite;
    z-index: -1;
}

@keyframes logoSlideIn {
    0% {
        opacity: 0;
        transform: translateY(-50px) scale(0.5) rotate(-10deg);
    }
    60% {
        transform: translateY(10px) scale(1.1) rotate(5deg);
    }
    100% {
        opacity: 1;
        transform: translateY(0) scale(1) rotate(0deg);
    }
}

@keyframes logoFloat {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
        filter: drop-shadow(0 8px 24px rgba(255, 255, 255, 0.4));
    }
    25% {
        transform: translateY(-15px) rotate(2deg);
        filter: drop-shadow(0 12px 32px rgba(255, 255, 255, 0.5));
    }
    75% {
        transform: translateY(-15px) rotate(-2deg);
        filter: drop-shadow(0 12px 32px rgba(255, 255, 255, 0.5));
    }
}

@keyframes logoGlow {
    0%, 100% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 0.5;
    }
    50% {
        transform: translate(-50%, -50%) scale(1.2);
        opacity: 0.8;
    }
}

/* Loading Spinner */
.preloader-spinner {
    width: 80px;
    height: 80px;
    margin: 0 auto 2rem;
    position: relative;
    z-index: 1;
    animation: spinnerFadeIn 1s cubic-bezier(0.34, 1.56, 0.64, 1) 0.4s both;
}

.preloader-spinner::before,
.preloader-spinner::after {
    content: '';
    position: absolute;
    border-radius: 50%;
    border: 3px solid transparent;
    animation: spinnerRotate 1.5s linear infinite;
}

.preloader-spinner::before {
    width: 100%;
    height: 100%;
    border-top-color: rgba(255, 255, 255, 0.9);
    border-right-color: rgba(255, 255, 255, 0.9);
    box-shadow: 
        0 0 20px rgba(255, 255, 255, 0.3),
        inset 0 0 20px rgba(255, 255, 255, 0.1);
}

.preloader-spinner::after {
    width: 70%;
    height: 70%;
    top: 15%;
    left: 15%;
    border-bottom-color: rgba(38, 158, 173, 0.8);
    border-left-color: rgba(38, 158, 173, 0.8);
    animation: spinnerRotate 1.5s linear infinite reverse;
    box-shadow: 
        0 0 15px rgba(38, 158, 173, 0.4),
        inset 0 0 15px rgba(38, 158, 173, 0.2);
}

.preloader-spinner .spinner-center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 20px;
    height: 20px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.9) 0%, rgba(38, 158, 173, 0.9) 100%);
    border-radius: 50%;
    animation: centerPulse 1.5s ease-in-out infinite;
    box-shadow: 0 0 15px rgba(255, 255, 255, 0.5);
}

@keyframes spinnerFadeIn {
    0% {
        opacity: 0;
        transform: scale(0) rotate(180deg);
    }
    60% {
        transform: scale(1.2) rotate(-10deg);
    }
    100% {
        opacity: 1;
        transform: scale(1) rotate(0deg);
    }
}

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

@keyframes centerPulse {
    0%, 100% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 1;
    }
    50% {
        transform: translate(-50%, -50%) scale(1.3);
        opacity: 0.7;
    }
}

/* Loading Text */
.preloader-text {
    color: rgba(255, 255, 255, 0.95);
    font-size: 1.125rem;
    font-weight: 600;
    margin-top: 1rem;
    position: relative;
    z-index: 1;
    animation: textSlideUp 1s cubic-bezier(0.34, 1.56, 0.64, 1) 0.8s both;
    letter-spacing: 1px;
    text-transform: uppercase;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.preloader-text::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.8), transparent);
    animation: textUnderline 1.5s ease-out 1.5s forwards;
}

@keyframes textSlideUp {
    0% {
        opacity: 0;
        transform: translateY(30px) scale(0.8);
    }
    60% {
        transform: translateY(-5px) scale(1.05);
    }
    100% {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes textUnderline {
    0% {
        width: 0;
    }
    100% {
        width: 100%;
    }
}

/* Loading Dots */
.preloader-dots {
    display: inline-flex;
    gap: 0.75rem;
    margin-top: 1rem;
    position: relative;
    z-index: 1;
    animation: dotsFadeIn 1s ease-out 1s both;
}

.preloader-dot {
    width: 12px;
    height: 12px;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 50%;
    position: relative;
    animation: dotWave 1.6s ease-in-out infinite;
    box-shadow: 
        0 0 10px rgba(255, 255, 255, 0.5),
        inset 0 0 5px rgba(255, 255, 255, 0.3);
}

.preloader-dot::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    animation: dotRipple 1.6s ease-out infinite;
}

.preloader-dot:nth-child(1) {
    animation-delay: 0s;
}

.preloader-dot:nth-child(1)::before {
    animation-delay: 0s;
}

.preloader-dot:nth-child(2) {
    animation-delay: 0.2s;
}

.preloader-dot:nth-child(2)::before {
    animation-delay: 0.2s;
}

.preloader-dot:nth-child(3) {
    animation-delay: 0.4s;
}

.preloader-dot:nth-child(3)::before {
    animation-delay: 0.4s;
}

@keyframes dotsFadeIn {
    0% {
        opacity: 0;
        transform: scale(0);
    }
    100% {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes dotWave {
    0%, 100% {
        transform: translateY(0) scale(1);
        opacity: 0.9;
    }
    50% {
        transform: translateY(-20px) scale(1.3);
        opacity: 1;
    }
}

@keyframes dotRipple {
    0% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 0.8;
    }
    100% {
        transform: translate(-50%, -50%) scale(2.5);
        opacity: 0;
    }
}

/* Progress Bar */
.preloader-progress {
    width: 250px;
    height: 6px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 10px;
    margin: 2rem auto 0;
    overflow: hidden;
    position: relative;
    z-index: 1;
    animation: progressFadeIn 1s cubic-bezier(0.34, 1.56, 0.64, 1) 1.2s both;
    box-shadow: 
        inset 0 2px 4px rgba(0, 0, 0, 0.2),
        0 0 20px rgba(255, 255, 255, 0.1);
}

.preloader-progress-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, 
        rgba(255, 255, 255, 0.9) 0%, 
        rgba(38, 158, 173, 0.9) 50%,
        rgba(255, 255, 255, 0.9) 100%);
    border-radius: 10px;
    transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    box-shadow: 
        0 0 15px rgba(255, 255, 255, 0.4),
        inset 0 0 10px rgba(255, 255, 255, 0.2);
}

.preloader-progress-bar::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, 
        transparent 0%, 
        rgba(255, 255, 255, 0.6) 30%,
        rgba(255, 255, 255, 0.8) 50%,
        rgba(255, 255, 255, 0.6) 70%,
        transparent 100%);
    animation: progressShimmer 2s infinite;
}

.preloader-progress-bar::after {
    content: '';
    position: absolute;
    top: -2px;
    left: 0;
    width: 20px;
    height: 10px;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 50%;
    animation: progressDot 2s infinite;
    box-shadow: 0 0 10px rgba(255, 255, 255, 0.6);
}

@keyframes progressFadeIn {
    0% {
        opacity: 0;
        transform: scaleX(0) translateY(20px);
    }
    100% {
        opacity: 1;
        transform: scaleX(1) translateY(0);
    }
}

@keyframes progressShimmer {
    0% {
        transform: translateX(-100%);
    }
    100% {
        transform: translateX(200%);
    }
}

@keyframes progressDot {
    0% {
        left: 0;
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        left: 100%;
        opacity: 0;
    }
}

/* Page Transition Overlay */
.page-transition {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(32, 69, 98, 0.95) 0%, rgba(38, 158, 173, 0.9) 100%);
    z-index: 9998;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease-out, visibility 0.3s ease-out;
    pointer-events: none;
}

.page-transition.active {
    opacity: 1;
    visibility: visible;
    pointer-events: all;
}

/* Fade In Animation for Page Content */
.page-content {
    opacity: 0;
    animation: pageFadeIn 0.6s ease-out forwards;
}

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

/* Responsive */
@media (max-width: 768px) {
    .preloader-logo img {
        max-width: 150px;
    }
    
    .preloader-spinner {
        width: 50px;
        height: 50px;
    }
    
    .preloader-text {
        font-size: 0.875rem;
    }
    
    .preloader-progress {
        width: 150px;
    }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    .preloader {
        background: linear-gradient(135deg, rgba(20, 30, 40, 0.98) 0%, rgba(30, 50, 60, 0.95) 100%);
    }
}