*{margin:0;padding:0;box-sizing:border-box}:root{--radius: 24px;--radius-sm: 16px;--radius-xs: 12px;--radius-full: 100px;--ease-out-quart: cubic-bezier(.25, 1, .5, 1);--ease-out-expo: cubic-bezier(.16, 1, .3, 1);--ease-in-out: cubic-bezier(.65, 0, .35, 1);--duration-fast: .12s;--duration-base: .2s;--duration-slow: .35s;--duration-entrance: .45s}[data-theme=dark]{--bg: oklch(.06 .003 258);--surface: oklch(.155 .005 258);--surface-hover: oklch(.21 .006 258);--surface-elevated: oklch(.195 .006 258);--surface-input: oklch(.17 .004 258);--border: oklch(.28 .006 258);--border-subtle: oklch(.22 .004 258);--text-primary: oklch(.96 .001 95);--text-secondary: oklch(.64 .008 250);--text-tertiary: oklch(.44 .005 250);--text-inverse: oklch(.09 .003 258);--accent: oklch(.65 .14 200);--accent-dim: oklch(.45 .1 200);--danger: oklch(.55 .18 25);--logo-circle: oklch(.96 .001 95);--logo-stroke: oklch(.09 .003 258);--shadow-card: 0 8px 32px oklch(0 0 0 / .3);--shadow-modal: 0 24px 64px oklch(0 0 0 / .5);--shadow-glow: 0 0 12px oklch(.62 .12 200 / .08);--shadow-btn: 0 4px 16px oklch(0 0 0 / .3);--overlay-bg: oklch(0 0 0 / .82);--drag-glow: 0 0 48px oklch(.62 .12 200 / .15);--gradient-border-start: oklch(.25 .01 200 / 0);--gradient-border-end: oklch(.25 .01 200 / 0);--shimmer-color: oklch(.8 .05 200 / .3)}[data-theme=light]{--bg: oklch(.97 .002 90);--surface: oklch(.93 .005 250);--surface-hover: oklch(.88 .007 250);--surface-elevated: oklch(.9 .006 250);--surface-input: oklch(.91 .005 250);--border: oklch(.72 .007 250);--border-subtle: oklch(.78 .005 250);--text-primary: oklch(.095 .003 260);--text-secondary: oklch(.36 .008 250);--text-tertiary: oklch(.52 .006 250);--text-inverse: oklch(.97 .001 95);--accent: oklch(.52 .16 200);--accent-dim: oklch(.46 .1 200);--danger: oklch(.48 .18 25);--logo-circle: oklch(.095 .003 260);--logo-stroke: oklch(.97 .001 95);--shadow-card: 0 4px 20px oklch(.6 .01 250 / .15);--shadow-modal: 0 16px 48px oklch(.5 .01 250 / .2);--shadow-glow: 0 0 12px 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var(--ease-out-quart)}.logo-line{fill:none;stroke:var(--logo-stroke);transition:stroke var(--duration-base) var(--ease-out-quart)}.logo-dot{fill:var(--logo-stroke);transition:fill var(--duration-base) var(--ease-out-quart)}.logo-text{font-size:1.25rem;font-weight:600;letter-spacing:-.02em;-webkit-user-select:none;user-select:none}.header-right{display:flex;align-items:center;gap:12px}.theme-toggle{background:var(--surface);border:none;border-radius:var(--radius-full);padding:8px;cursor:pointer;display:flex;align-items:center;justify-content:center;color:var(--text-secondary);transition:background var(--duration-base) var(--ease-out-quart),color var(--duration-base) var(--ease-out-quart),transform var(--duration-fast) var(--ease-out-expo);width:36px;height:36px}.theme-toggle:hover{background:var(--surface-hover);color:var(--text-primary);transform:scale(1.05)}.theme-toggle:active{transform:scale(.92)}.theme-toggle-icon{transition:transform var(--duration-slow) var(--ease-out-quart)}.theme-toggle .sun,.theme-toggle .moon{position:absolute;transition:opacity var(--duration-base) var(--ease-out-quart),transform var(--duration-base) var(--ease-out-quart)}[data-theme=dark] .theme-toggle .sun{opacity:1;transform:rotate(0) scale(1)}[data-theme=dark] .theme-toggle .moon{opacity:0;transform:rotate(-90deg) scale(.5)}[data-theme=light] .theme-toggle .sun{opacity:0;transform:rotate(90deg) scale(.5)}[data-theme=light] .theme-toggle .moon{opacity:1;transform:rotate(0) scale(1)}.theme-toggle svg{width:18px;height:18px;position:relative}.nickname-input{background:var(--surface-input);color:var(--text-primary);border:none;padding:8px 16px;border-radius:var(--radius-full);font-family:Space Grotesk,sans-serif;font-size:.8125rem;font-weight:500;width:140px;transition:background var(--duration-base) var(--ease-out-quart),box-shadow var(--duration-base) 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var(--ease-out-quart)}.modal-file:hover{background:var(--surface-hover)}.password-input-wrapper{position:relative;margin-bottom:8px}.password-input{width:100%;background:var(--surface-input);color:var(--text-primary);border:none;padding:14px 44px 14px 18px;border-radius:var(--radius-xs);font-family:Space Grotesk,sans-serif;font-size:.875rem;transition:background var(--duration-base) var(--ease-out-quart),box-shadow var(--duration-base) var(--ease-out-quart)}.password-input::placeholder{color:var(--text-tertiary)}.password-input:hover{background:var(--surface-hover)}.password-input:focus{outline:none;background:var(--surface-hover)}.password-toggle{position:absolute;right:12px;top:50%;transform:translateY(-50%);background:none;border:none;cursor:pointer;color:var(--text-tertiary);padding:4px;display:flex;align-items:center;transition:color var(--duration-fast) var(--ease-out-quart),transform var(--duration-fast) var(--ease-out-quart)}.password-toggle:hover{color:var(--text-secondary)}.password-toggle:active{transform:translateY(-50%) scale(.92)}.password-error{font-size:.75rem;font-weight:500;color:var(--danger);margin-bottom:16px;min-height:18px;transition:color var(--duration-base) var(--ease-out-quart)}.modal-actions{display:flex;gap:12px}.btn{flex:1;padding:14px 24px;border:none;border-radius:var(--radius-full);font-family:Space Grotesk,sans-serif;font-size:.875rem;font-weight:600;cursor:pointer;transition:transform var(--duration-fast) var(--ease-out-expo),background var(--duration-base) var(--ease-out-quart),box-shadow var(--duration-base) var(--ease-out-quart);text-transform:uppercase;letter-spacing:.05em;position:relative;-webkit-user-select:none;user-select:none}.btn-accept{background:var(--text-primary);color:var(--text-inverse)}.btn-accept:hover{transform:translateY(-1px)}.btn-accept:active{transform:translateY(0) 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both}.send-bar-row{display:flex;align-items:center;gap:12px}.send-bar select{flex:1;background:var(--surface-input);color:var(--text-primary);border:none;padding:10px 36px 10px 14px;border-radius:var(--radius-full);font-family:Space Grotesk,sans-serif;font-size:.8125rem;-webkit-appearance:none;-moz-appearance:none;appearance:none;cursor:pointer;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23999999' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center;transition:background var(--duration-base) var(--ease-out-quart),box-shadow var(--duration-base) var(--ease-out-quart)}.send-bar select:hover{background-color:var(--surface-hover)}.send-bar select:focus{outline:none}.send-bar-password{flex:1;background:var(--surface-input);color:var(--text-primary);border:none;padding:10px 14px;border-radius:var(--radius-full);font-family:Space Grotesk,sans-serif;font-size:.8125rem;transition:background var(--duration-base) var(--ease-out-quart),box-shadow var(--duration-base) var(--ease-out-quart)}.send-bar-password::placeholder{color:var(--text-tertiary)}.send-bar-password:hover{background:var(--surface-hover)}.send-bar-password:focus{outline:none;background:var(--surface-hover)}.send-btn{padding:10px 20px;background:var(--text-primary);color:var(--text-inverse);border:none;border-radius:var(--radius-full);font-family:Space Grotesk,sans-serif;font-size:.8125rem;font-weight:600;cursor:pointer;transition:transform var(--duration-fast) var(--ease-out-expo),background var(--duration-base) var(--ease-out-quart),box-shadow var(--duration-base) var(--ease-out-quart),opacity var(--duration-base) var(--ease-out-quart);white-space:nowrap;position:relative;-webkit-user-select:none;user-select:none}.send-btn:hover{transform:translateY(-1px)}.send-btn:active{transform:translateY(0) 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