/* -------------------------------------------------- */
/* Golem Search Engine UI/UX Style Definitions        */
/* -------------------------------------------------- */

:root {
    /* Color Palette */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --text-primary: #202124;
    --text-secondary: #4d5156;
    --text-stats: #70757a;
    --color-link: #1a0dab;
    --color-link-visited: #681da8;
    --color-border: #dfe1e5;
    
    /* Dynamic Brand Gradients */
    --brand-gradient: linear-gradient(135deg, #4285f4, #ea4335, #f4b400, #34a853);
    
    /* Shadows & Effects */
    --shadow-sm: 0 1px 3px rgba(32, 33, 36, 0.1);
    --shadow-md: 0 4px 12px rgba(32, 33, 36, 0.15);
    --shadow-focus: 0 1px 6px rgba(32, 33, 36, 0.28);
    
    /* Animation Easing (Smooth & Premium) */
    --ease-spring: cubic-bezier(0.175, 0.885, 0.32, 1.05);
    --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
}

/* -------------------------------------------------- */
/* Resets & Typography                                */
/* -------------------------------------------------- */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Inter', 'Noto Sans KR', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-y: scroll; 
}

a {
    text-decoration: none;
    color: inherit;
}

/* -------------------------------------------------- */
/* Main Layout Architecture                           */
/* -------------------------------------------------- */
.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    padding-top: 35vh; 
    transition: padding-top 0.8s var(--ease-spring);
    position: relative;
}

/* -------------------------------------------------- */
/* Header & Search UI (Initial Center State)          */
/* -------------------------------------------------- */
.search-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    padding: 0 20px;
    transition: all 0.7s var(--ease-smooth);
    z-index: 100;
}

.logo {
    font-size: 5.5rem;
    font-weight: 800;
    letter-spacing: -2.5px;
    margin-bottom: 30px;
    background: var(--brand-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    user-select: none;
    transition: transform 0.6s var(--ease-spring), margin 0.6s var(--ease-smooth);
    transform-origin: center center;
}

.search-bar-wrapper {
    width: 100%;
    max-width: 584px;
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    transition: max-width 0.6s var(--ease-smooth);
}

.search-input-container {
    display: flex;
    align-items: center;
    width: 100%;
    height: 48px;
    background-color: var(--bg-primary);
    border: 1px solid var(--color-border);
    border-radius: 24px;
    padding: 0 16px;
    transition: box-shadow 0.3s var(--ease-smooth), border-color 0.3s var(--ease-smooth);
}

.search-input-container:hover,
.search-input-container:focus-within {
    box-shadow: var(--shadow-focus);
    border-color: transparent;
}

.search-icon {
    width: 20px;
    height: 20px;
    fill: #9aa0a6;
    margin-right: 12px;
    transition: fill 0.3s ease;
}

.search-input-container:focus-within .search-icon {
    fill: #4285f4;
}

.search-input {
    flex: 1;
    height: 100%;
    border: none;
    outline: none;
    font-size: 1.05rem;
    color: var(--text-primary);
    background: transparent;
}

.mic-icon-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.mic-icon-wrapper:hover {
    background-color: var(--bg-secondary);
}

.mic-icon {
    width: 24px;
    height: 24px;
}

.buttons-group {
    display: flex;
    gap: 12px;
    margin-top: 28px;
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    transition: opacity 0.3s ease, transform 0.4s var(--ease-spring), margin 0.4s;
}

.golem-btn {
    background-color: var(--bg-secondary);
    border: 1px solid transparent;
    color: var(--text-primary);
    font-size: 0.9rem;
    padding: 0 16px;
    height: 36px;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.golem-btn:hover {
    box-shadow: var(--shadow-sm);
    border-color: var(--color-border);
}

/* -------------------------------------------------- */
/* State Change: is-searching                         */
/* -------------------------------------------------- */
.app-container.is-searching {
    padding-top: 20px;
}

.app-container.is-searching .search-header {
    flex-direction: row;
    align-items: center;
    justify-content: flex-start;
    max-width: 1200px;
    margin: 0 auto;
    padding: 10px 20px 20px 20px;
    border-bottom: 1px solid #ebebeb;
}

.app-container.is-searching .logo {
    font-size: 2.2rem;
    margin-bottom: 0;
    margin-right: 40px;
    transform-origin: left center;
    cursor: pointer;
}

.app-container.is-searching .search-bar-wrapper {
    max-width: 692px;
    align-items: flex-start;
    flex: 1;
}

.app-container.is-searching .search-input-container {
    height: 44px;
    box-shadow: var(--shadow-sm);
}

.app-container.is-searching .search-input-container:focus-within {
    box-shadow: var(--shadow-focus);
}

.app-container.is-searching .buttons-group {
    opacity: 0;
    visibility: hidden;
    height: 0;
    margin: 0;
    transform: translateY(-10px);
    pointer-events: none;
}

/* -------------------------------------------------- */
/* Results Section Styling                            */
/* -------------------------------------------------- */
.results-section {
    width: 100%;
    max-width: 692px;
    margin: 0 auto;
    padding: 10px 20px 60px max(calc(50vw - 600px + 140px), 160px); 
    
    opacity: 0;
    visibility: hidden;
    transform: translateY(40px);
    transition: opacity 0.5s ease, transform 0.7s var(--ease-spring);
    transition-delay: 0.1s;
}

.app-container.is-searching .results-section {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.results-stats {
    color: var(--text-stats);
    font-size: 0.875rem;
    margin-bottom: 24px;
}

.result-item {
    margin-bottom: 32px;
    animation: fadeInSlideUp 0.6s var(--ease-spring) backwards;
}

.result-item:nth-child(1) { animation-delay: 0.1s; }
.result-item:nth-child(2) { animation-delay: 0.15s; }
.result-item:nth-child(3) { animation-delay: 0.2s; }

.result-url-wrapper {
    display: flex;
    align-items: center;
    margin-bottom: 8px;
}

.result-favicon {
    width: 18px;
    height: 18px;
    margin-right: 12px;
    border-radius: 50%;
    background-color: var(--bg-secondary);
    padding: 2px;
    box-shadow: 0 1px 2px rgba(0,0,0,0.05);
}

.result-url {
    color: var(--text-primary);
    font-size: 0.875rem;
    font-weight: 400;
}

.result-title {
    display: inline-block;
    color: var(--color-link);
    font-size: 1.25rem;
    font-weight: 500;
    line-height: 1.3;
    margin-bottom: 6px;
    transition: color 0.2s ease;
}

.result-title:hover {
    text-decoration: underline;
}

.result-title:visited {
    color: var(--color-link-visited);
}

.result-snippet {
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.6;
    max-width: 600px;
}

.result-snippet b {
    color: var(--text-primary);
    font-weight: 600;
}

/* -------------------------------------------------- */
/* Keyframes & Animations                             */
/* -------------------------------------------------- */
@keyframes fadeInSlideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* -------------------------------------------------- */
/* Responsive Design                                  */
/* -------------------------------------------------- */
@media screen and (max-width: 768px) {
    .app-container {
        padding-top: 25vh;
    }
    
    .logo {
        font-size: 4rem;
    }
    
    .app-container.is-searching .search-header {
        flex-direction: column;
        align-items: flex-start;
        padding-bottom: 16px;
    }
    
    .app-container.is-searching .logo {
        margin-bottom: 20px;
    }
    
    .results-section {
        padding: 10px 20px 40px 20px;
        margin: 0;
    }
}